Shortness of breath is a respiratory symptom that occurs when the lungs cannot receive enough oxygen or when the body’s increased oxygen need cannot be met. Conditions such as asthma, COPD, heart diseases, lung infections, anemia, and intense stress may make the breathing process difficult and cause respiratory distress.
Sudden-onset shortness of breath is usually associated with pulmonary embolism, pneumonia, allergic reactions, or heart-related circulatory problems. In such cases, symptoms such as increased respiratory rate, a feeling of tightness in the chest, and weakness may accompany it. Medical evaluation is important in terms of quickly identifying the underlying cause.
Conditions that lead to chronic shortness of breath include COPD, asthma, obesity, heart failure, and chronic diseases affecting lung tissue. In these conditions, respiratory capacity decreases over time and breathing difficulty becomes especially noticeable during physical exertion. Regular follow-up and appropriate treatment help preserve respiratory functions.
Supportive approaches that are good for shortness of breath include providing fresh air, sitting in an upright position, and applying controlled and deep breathing exercises. Medication treatments aimed at the underlying disease, respiratory rehabilitation, and lifestyle adjustments may contribute to improving respiratory capacity.
| What You Need to Know | Information |
| What is shortness of breath? | It is a symptom characterized by difficulty breathing or the feeling of not being able to breathe enough. Its medical name is “dyspnea.” |
| Causes of sudden shortness of breath | Asthma attack, allergic reaction, anaphylaxis, pulmonary embolism, heart attack, pneumothorax (collapsed lung), panic attack |
| Causes of chronic shortness of breath | COPD, asthma, heart failure, interstitial lung diseases, obesity, anemia, pulmonary fibrosis |
| Cardiac causes | Heart failure, ischemic heart disease, arrhythmias, valve diseases |
| Pulmonary causes | COPD, asthma, pneumonia, bronchitis, pulmonary embolism, tuberculosis, lung cancer |
| Systemic causes | Anemia, thyroid diseases (hyperthyroidism), metabolic acidosis, sepsis |
| Psychogenic causes | Anxiety disorder, panic attack, depression |
| Factors that worsen shortness of breath | Exercise, exposure to allergens, smoking, air pollution, high altitude, obesity |
| General measures that are good for shortness of breath | Fresh air, rest, quitting smoking, weight control, regular exercise (in appropriate cases), staying away from allergens |
| Medical treatment options | Bronchodilators (for example salbutamol), corticosteroids, diuretics (if heart failure is present), antibiotics (if infection is present), anticoagulants (if embolism is present) |
| Supportive methods that can be applied at home | Steam inhalation, ventilating the environment, breathing exercises, sleeping with the head elevated, deep breathing techniques through the nose |
| Conditions requiring emergency medical intervention | Sudden-onset severe shortness of breath, bluish discoloration of the lips, change in consciousness, chest pain, fainting, increased wheezing |
What Is Shortness of Breath and How Is It Felt?
Shortness of breath describes the feeling that breathing has become difficult or insufficient. This may present in various ways, such as tightness in the chest, a feeling of suffocation, not getting enough air, or rapid breathing. While some people complain of not being able to take a deep breath, others state that they need to make excessive effort to breathe in and out. The severity of this feeling may range from mild discomfort to a life-threatening emergency.
Definition of the Feeling of Shortness of Breath
Shortness of breath is a subjective experience in which the individual feels the need to increase their breathing effort. This comes with increased effort by the respiratory muscles and often creates an uncomfortable feeling. The person may feel that not enough oxygen is entering their lungs or that enough carbon dioxide cannot be removed from their body. This may be a normal feeling after physical exertion, or it may appear unexpectedly and drive the person into panic.
Different Types and Symptoms of Shortness of Breath
Shortness of breath does not fit into a single pattern; it may present with various symptoms depending on different causes. In some cases, shortness of breath occurs suddenly and severely (acute dyspnea). For example, an asthma attack or pulmonary embolism (clot in the lung) falls into this category. In other cases, shortness of breath develops gradually over time and becomes chronic (chronic dyspnea). Conditions such as chronic obstructive pulmonary disease (COPD) or heart failure may lead to chronic shortness of breath.
Symptoms may include:
- Tightness or pain in the chest: This may be seen especially in heart conditions.
- Feeling of suffocation: You may feel as if there is something in your throat or as if your breath is being cut off.
- Rapid breathing (tachypnea): The body increases the breathing rate to take in more oxygen.
- Inability to take a deep breath: The feeling that you cannot fully draw air in.
- Wheezing or whistling sound: It may be heard especially in airway diseases such as asthma or COPD.
- Blue lips or nails (cyanosis): This is a serious sign that the blood is not sufficiently oxygenated and requires emergency medical intervention.
- Dizziness or lightheadedness: It may be a result of insufficient oxygen intake.
- Fatigue: The extra effort spent on breathing may cause general fatigue.
The presence of these symptoms is critically important for determining the underlying cause of shortness of breath.
Main Conditions That Cause Shortness of Breath
Shortness of breath may be a sign of many different health problems rather than a symptom of a single disease. Understanding these causes is the first step for correct diagnosis and treatment.
Respiratory System Diseases
Problems related to the lungs and airways are among the most common causes of shortness of breath.
- Asthma: Shortness of breath, wheezing, and coughing attacks occur as a result of inflammation and narrowing of the airways. Asthma attacks may lead to sudden and severe shortness of breath.
- Chronic Obstructive Pulmonary Disease (COPD): It is a progressive disease in which the bronchi and lung sacs (alveoli) are damaged. Smoking is the main cause. Shortness of breath usually begins with exertion and increases over time.
- Pneumonia: Infection in the lungs causes the alveoli to fill with fluid, impairing oxygen exchange. Fever, cough, and shortness of breath are the main symptoms.
- Pulmonary Embolism (Clot in the Lung): This is the condition in which blood clots in the legs or elsewhere in the body travel to the lungs and block blood flow to the air sacs. Sudden-onset severe shortness of breath, chest pain, and cough may be seen. This is a life-threatening condition.
- Pneumothorax (Collapsed Lung): It is the partial or complete collapse of the lung as a result of air entering between the lung membranes. It causes sudden chest pain and shortness of breath.
- Lung Cancer: Tumors may cause shortness of breath by blocking the airways or damaging lung tissue.
- Tuberculosis: It is a bacterial infection that affects the lungs and may cause shortness of breath.
- Bronchitis: It is inflammation of the bronchi. While acute bronchitis usually presents with cough, chronic bronchitis may lead to shortness of breath.
Heart and Circulatory System Diseases
The heart not being able to pump enough blood or problems in blood vessels may also cause shortness of breath.
- Heart Failure: It is the condition in which the heart cannot pump enough blood needed by the body. It causes shortness of breath by leading to fluid accumulation in the lungs (pulmonary edema). Shortness of breath increases especially while lying down or during exertion.
- Heart Attack (Myocardial Infarction): It is the sudden interruption of blood flow to the heart muscle. In addition to chest pain, sudden shortness of breath may also be seen.
- Arrhythmias (Heart Rhythm Disorders): Irregular beating of the heart may affect blood circulation and lead to shortness of breath.
- Hypertension (High Blood Pressure): Uncontrolled high blood pressure may strain the heart over time, causing heart failure and therefore shortness of breath.
- Heart Valve Diseases: Improper functioning of heart valves may cause blood to leak backward or the flow to be obstructed, causing the heart to work harder and leading to shortness of breath.
Other Medical Conditions and Factors
Many factors outside the respiratory and circulatory systems may also cause shortness of breath.
- Anemia: The absence of enough red blood cells or hemoglobin in the body causes insufficient oxygen delivery to tissues. This causes the body to increase the breathing rate to take in more oxygen and leads to the feeling of shortness of breath.
- Obesity: Excess weight, especially fat tissue in the chest and abdominal area, may prevent the lungs from fully expanding. In addition, the burden on the heart and respiratory system increases in obese individuals.
- Anxiety and Panic Attacks: Psychological causes may also lead to physical symptoms. The intense fear and anxiety felt during a panic attack may cause symptoms such as shortness of breath, palpitations, and sweating. This is one of the most common causes of shortness of breath, but it is important to rule out another underlying medical condition.
- Allergic Reactions (Anaphylaxis): Severe allergic reactions may cause the airways to suddenly swell and close, leading to life-threatening shortness of breath.
- Kidney Failure: The kidneys being unable to remove excess fluid from the body may cause fluid accumulation in the lungs.
- Thyroid Diseases: An overactive thyroid gland (hyperthyroidism) may accelerate the body’s metabolism and lead to shortness of breath.
- Neuromuscular Diseases: Diseases affecting the muscles or nerves (for example, ALS, myasthenia gravis) may cause weakening of the respiratory muscles and shortness of breath.
- High Altitude: Oxygen pressure is lower at places above sea level, which may cause shortness of breath.
Environmental and Lifestyle Factors
- Cigarette Smoke and Air Pollution: Toxins and particles may damage the airways and lungs and lead to shortness of breath.
- Excessive Physical Activity: Especially in people with poor fitness, the increased oxygen demand of the body may cause temporary shortness of breath.
- Certain Medications: Shortness of breath may be seen as a side effect of some medications.
- Exposure to Toxic Gases: Conditions such as carbon monoxide poisoning cause severe shortness of breath.
Determining the cause of shortness of breath is essential for creating the correct treatment strategy. Therefore, it is vitally important to consult a healthcare professional, especially in shortness of breath that starts suddenly, is severe, or is seen together with other symptoms.
When Should Emergency Medical Help Be Sought?
Not every case of shortness of breath is an emergency, but some symptoms indicate the seriousness of the condition and the need for urgent intervention. Recognizing these signs may be lifesaving.
Life-Threatening Signs
Shortness of breath experienced together with the following symptoms indicates a serious condition requiring immediate medical help:
- Sudden-Onset Severe Shortness of Breath: Especially shortness of breath that appears without any triggering cause and rapidly worsens. This may be a sign of conditions such as pulmonary embolism or pneumothorax.
- Chest Pain: Chest pain accompanying shortness of breath may be a sign of heart attack or other serious heart conditions. The pain is usually felt as pressure, tightness, or burning.
- Blue Lips or Nails (Cyanosis): Indicates that the blood oxygen level has dropped dangerously. This is a critical condition requiring emergency oxygen therapy and medical intervention.
- Confusion or Sudden Behavioral Changes: May be a sign that not enough oxygen is reaching the brain. Confusion, lightheadedness, excessive drowsiness, or agitation requires emergency intervention.
- Rapid and Shallow Breathing: Much faster and shallower breathing than normal indicates that the body is struggling to meet its oxygen need.
- Difficulty Speaking: Having difficulty forming full sentences due to shortness of breath indicates the seriousness of the condition.
- Excessive Sweating: Especially cold sweating may indicate that the body is under stress and fighting a serious medical problem.
- Fast Heartbeat (Tachycardia) or Irregular Heartbeat: The heart may try to work faster to compensate for oxygen deficiency or may experience rhythm disorder.
- High Fever: Especially if accompanied by cough and sputum, it may be a sign of a serious infection such as pneumonia.
- Significant Amount of Bloody Sputum: Coughing up blood may be a sign of a serious problem in the lungs (for example, bronchiectasis, tuberculosis, or cancer).
In Which Situations Should a Doctor Be Consulted?
Even if the emergency symptoms above are not present, it is important to consult a doctor in the following situations:
- New-Onset or Worsening Shortness of Breath: If shortness of breath has never been experienced before or the existing condition is worsening.
- If It Interferes with Daily Activities: If shortness of breath makes simple daily tasks such as walking, climbing stairs, or getting dressed difficult.
- If It Continues Even at Rest: If shortness of breath is felt not only during exertion but also at rest.
- If It Becomes Chronic: If shortness of breath continues for weeks or months.
- If It Is Accompanied by Cough: Especially if there is productive or bloody cough.
- If There Is Wheezing or Whistling Sound: This may be a sign of airway narrowing.
- Recurrent Shortness of Breath Attacks: Especially if there is a known respiratory disease such as asthma or COPD, the frequency and severity of attacks should be monitored.
- If It Is Related to a Specific Trigger: For example, if shortness of breath is constantly experienced after exposure to allergens.
Consulting a doctor is the safest way to determine the underlying cause of shortness of breath and start appropriate treatment. Trying to diagnose yourself or ignoring symptoms may cause serious health problems to progress.
Methods and Treatments That Are Good for Shortness of Breath
Treatment of shortness of breath varies greatly depending on the underlying cause. However, along with medical treatments, some methods that can be applied in daily life may help relieve symptoms and improve quality of life.
Medical Treatments (Under Doctor Supervision)
After the cause of shortness of breath is determined, your doctor may recommend one or more of the following treatments:
- Medication Therapy:
Bronchodilators: These are medications that make breathing easier by widening the airways (for example, used in the treatment of asthma and COPD). Corticosteroids: Used to reduce inflammation in the airways. There are inhaled forms and oral forms. Antibiotics: Used in shortness of breath due to bacterial infections such as pneumonia. Diuretics: Help remove excess fluid from the body in conditions such as heart failure. Blood Thinners: Used to prevent clot formation or dissolve existing clots in conditions such as pulmonary embolism. Anxiety Medications: May be used under doctor supervision in shortness of breath due to psychological causes.
- Oxygen Therapy: Additional oxygen is given to patients with low blood oxygen levels through an oxygen mask or nasal cannula.
- Respiratory Physiotherapy: It is a treatment method focused on strengthening respiratory muscles, removing sputum, and teaching breathing techniques.
- Pulmonary Rehabilitation: It is a comprehensive program designed for individuals with chronic respiratory disease. It includes exercise training, breathing techniques, education, and psychological support.
- Surgical Intervention: In some cases (for example, severe heart valve disease, lung cancer, pneumothorax), surgical treatment may be required.
- Device Therapies:
CPAP/BiPAP Devices: Used in patients with sleep apnea or severe respiratory failure. Ventilator Support: Mechanical ventilation support is provided in very advanced respiratory failure.
Lifestyle Changes and Methods That Can Be Applied at Home
In addition to medical treatments, some changes and practices that can be made in daily life may help manage shortness of breath symptoms:
- Breathing Techniques:
Pursed-Lip Breathing: Breathe in slowly through your nose, then exhale over a longer period by pursing your lips as if whistling. This technique helps keep the airways open and reduces the feeling of shortness of breath. Diaphragmatic Breathing (Abdominal Breathing): While lying on your back or sitting, place one hand on your abdomen and the other on your chest. As you breathe in through your nose, feel your abdomen rise (not your chest). As you slowly breathe out through your mouth, feel your abdomen move inward. This allows breathing to be deeper and more effective.
- Body Position:
Leaning Forward (Tripod Position): Slightly leaning forward while sitting or standing and resting your elbows on your knees or a table may help the respiratory muscles work more comfortably. Leaning Against a Wall: Leaning your back against a wall while standing may provide similar relief. * Elevating the Head of the Bed: Raising your head and chest area by increasing your pillows while sleeping may reduce nighttime shortness of breath, especially in people with heart failure.
- Exercise and Movement:
Regular Light Exercise: Light exercises approved by your doctor (such as walking, swimming) strengthen respiratory and heart muscles, improve general fitness, and increase tolerance to shortness of breath. Breathing Exercises: Regularly doing special breathing exercises taught by your physiotherapist.
- Environmental Factors:
Avoiding Tobacco Smoke: Quitting smoking and staying away from environments with cigarette smoke. Protection from Air Pollution: Reducing time spent outdoors on days when air pollution is high and using a mask if necessary. Avoiding Allergens: If conditions such as asthma or allergic rhinitis are present, staying away from triggering allergens (pollen, dust mites, mold, etc.). Using an Air Humidifier: Dry air may trigger shortness of breath in some people. Using an air humidifier may be beneficial.
- Weight Control: Being overweight or obese places an additional burden on the respiratory system. Reaching and maintaining a healthy weight may significantly reduce shortness of breath.
- Nutrition: Balanced and healthy nutrition supports overall body health. Reducing salt intake may help prevent fluid accumulation, especially in people with heart failure.
- Stress Management: Anxiety and stress may trigger or worsen shortness of breath. Relaxation techniques (meditation, yoga, deep breathing exercises), hobbies, and social support may help cope with stress.
- Fluid Intake: Getting enough fluids is important, but in conditions such as heart failure, your doctor may recommend limiting fluid intake.
It should be remembered that these methods do not replace medical treatment. If you are experiencing shortness of breath, you should definitely consult a healthcare professional to learn the underlying cause and create an appropriate treatment plan.
Shortness of Breath and Psychological Factors: The Relationship with Anxiety and Panic Attacks
Shortness of breath is not only a symptom of a physical disorder, but also brings strong psychological effects. Especially anxiety and panic attacks may trigger the feeling of shortness of breath or further worsen shortness of breath due to existing physical causes. Understanding this two-way relationship is critical for improving both physical and mental health.
The Effect of Anxiety on Shortness of Breath
Anxiety is a condition that triggers the body’s “fight or flight” response. During this response, heart rate increases, blood pressure rises, and breathing accelerates. These physiological changes may cause symptoms such as shortness of breath, a feeling of suffocation, and tightness in the chest. The person becomes even more anxious by thinking that they cannot breathe, and this creates a vicious cycle: anxiety causes shortness of breath, and shortness of breath causes anxiety.
Panic Attacks and Dyspnea
A panic attack is a sudden and intense wave of fear or discomfort. During these attacks, the following symptoms may be seen:
- Severe shortness of breath or feeling of suffocation
- Palpitations, feeling heartbeats, or chest pain
- Sweating
- Trembling or shaking
- Nausea or abdominal discomfort due to shortness of breath
- Dizziness, lightheadedness, or feeling of fainting
- Feeling detached from reality (derealization) or detached from oneself (depersonalization)
- Fear of losing control or going crazy
- Fear of death
The shortness of breath experienced during a panic attack is extremely real and frightening even if there is no actual respiratory distress. These attacks usually occur unexpectedly and may last between a few minutes and half an hour.
Methods for Coping with Psychological Shortness of Breath
When the underlying cause of shortness of breath is thought to be psychological or when shortness of breath due to a physical cause triggers anxiety, the following methods may be beneficial:
- Cognitive Behavioral Therapy (CBT): CBT is an effective therapy method that focuses on changing negative thought patterns and behaviors. It teaches how to manage fears and anxieties that cause shortness of breath. It is frequently used in the treatment of panic attacks.
- Breathing Exercises and Mindfulness: Proper breathing techniques (pursed-lip breathing, diaphragmatic breathing) and mindfulness exercises may help calm anxiety and shortness of breath symptoms. These techniques allow the person to control the act of breathing instead of focusing on the physiological effects of anxiety.
- Relaxation Techniques: Relaxation techniques such as progressive muscle relaxation, meditation, and yoga may help reduce overall anxiety levels.
- Medication Therapy: Doctors may prescribe antidepressants or anxiolytic medications in cases of severe anxiety or panic attacks. These medications are usually more effective when used together with CBT.
- Physical Activity: Regular exercise plays an important role in reducing symptoms of anxiety and depression. It improves mood by promoting endorphin release.
- Social Support: Talking with family, friends, or support groups may reduce the feeling of loneliness and strengthen coping mechanisms.
Important Note: If you are experiencing shortness of breath, you should first undergo a medical evaluation to make sure there is no underlying physical cause. If your doctor determines that there is no physical cause, they may refer you to a mental health professional.
Nutrition and Herbal Solutions That Are Good for Shortness of Breath
Although medical methods are the priority in the treatment of shortness of breath, some dietary adjustments and herbal supports may contribute to relieving symptoms and supporting general health. However, it is important to remember that these solutions should not be used without consulting your doctor.
Nutrition Recommendations
A healthy and balanced diet may help the respiratory and circulatory systems work better by supporting the overall health of the body.
- Foods Rich in Antioxidants: Fruits and vegetables (especially dark green leafy vegetables, blackberries, blueberries) are rich in antioxidants. These compounds may help reduce inflammation in the body and prevent cell damage.
- Omega-3 Fatty Acids: Omega-3 fatty acids found in foods such as fatty fish like salmon and mackerel, walnuts, and flaxseed have anti-inflammatory properties and may support heart health.
- Fiber-Rich Foods: Fiber-rich foods such as whole grains, vegetables, and fruits regulate the digestive system and contribute to overall body health.
- Limiting Salt Consumption: Especially in individuals with heart failure, high salt intake may cause fluid accumulation in the body and increased shortness of breath. Avoiding processed foods and preparing meals with less salt is important.
- Adequate Fluid Intake: Drinking enough water is important for general health. However, in conditions such as heart failure, you may need to take the amount of fluid recommended by your doctor.
- Avoiding Highly Processed Foods: Processed foods that contain high amounts of sugar, saturated fat, and sodium may increase inflammation and negatively affect general health.
Herbal Solutions and Supplements
There are traditional uses and some studies suggesting that some herbal products may help relieve symptoms of shortness of breath. However, more scientific evidence is needed regarding the effectiveness and safety of these products. Always consult your doctor before using any herbal product, because these products may interact with your current medications or cause side effects.
Important Warnings:
- Consult Your Doctor: Always consult your doctor or pharmacist before using any herbal supplement or making any dietary change. This is much more important especially if you are pregnant, breastfeeding, or have a chronic disease.
- Interactions: Herbal products may interact with prescription or over-the-counter medications. These interactions may lead to serious health problems.
- Dosage and Quality: The dosage and quality of herbal products may vary. It is important to obtain them from reliable sources and follow recommended doses.
- Does Not Replace Medical Treatment: Herbal solutions and dietary changes do not replace the medications and treatments recommended by your doctor in the treatment of underlying medical conditions.
Frequently Asked Questions
What causes shortness of breath and which diseases can it be a symptom of?
Shortness of breath may be a symptom of many different health problems such as asthma, COPD, pneumonia, heart failure, anxiety disorders, and anemia. The lungs not being able to receive enough oxygen or the heart not being able to pump blood sufficiently may lead to breathing difficulty.
What is good for shortness of breath and what methods can be applied at home?
Getting fresh air, sitting upright, and doing slow and deep breathing exercises may relieve shortness of breath. Staying away from cigarette smoke, ventilating the environment, and regularly using the medications recommended by the doctor may also help reduce symptoms.
Can shortness of breath occur due to stress and anxiety?
Yes, rapid and shallow breathing may develop during stress and anxiety attacks. This may create a feeling of suffocation and breathlessness in the person. Relaxation techniques, breathing exercises, and psychological support when necessary may help control symptoms.
Can shortness of breath be an early symptom of heart diseases?
In some heart diseases, shortness of breath may be one of the early symptoms. Especially shortness of breath that increases during exertion, easy fatigue, and a feeling of pressure in the chest may be signs of conditions such as heart failure or coronary artery disease and should be evaluated.
In which situations is shortness of breath considered an emergency health problem?
If there is chest pain, bluish discoloration of the lips, confusion, or sudden-onset severe shortness of breath, emergency medical help should be sought. These symptoms may indicate life-threatening conditions such as pulmonary embolism, heart attack, or severe respiratory failure.
Why does shortness of breath increase while exercising and is this normal?
During intense exercise, the body’s oxygen need increases, so breathing accelerates. However, if shortness of breath occurs even during mild activities, there may be an underlying problem such as asthma, lack of fitness, or heart-lung diseases.
What are the lung diseases that cause shortness of breath?
Asthma, COPD, bronchitis, pneumonia, and pulmonary fibrosis are the main lung diseases that may lead to shortness of breath. In these diseases, the airways narrow or lung tissue is damaged, making oxygen exchange difficult and causing respiratory difficulty.
Which daily habits are important to prevent shortness of breath?
Not smoking, exercising regularly, staying within a healthy weight range, and avoiding air pollution as much as possible may reduce the risk of shortness of breath. In addition, keeping chronic diseases under regular control is also important.
What health problems does shortness of breath at night suggest?
Shortness of breath occurring at night may be a symptom of diseases such as heart failure, sleep apnea, or asthma. Especially waking up from sleep at night with the feeling of not being able to breathe may require medical evaluation in terms of the heart and respiratory system.
How is treatment for shortness of breath planned according to the underlying cause?
Treatment varies according to the disease that causes shortness of breath. Inhaler medications may be used in asthma and COPD, antibiotics in infections, and treatments that support heart function in heart diseases. Doctor evaluation is essential for correct diagnosis.

Prof. Dr. Kadriye Orta Kılıçkesmez is one of the leading figures in the field of Turkish cardiology. She was born on January 24, 1974, in Tekirdağ. After completing her undergraduate education at Istanbul University Cerrahpaşa Faculty of Medicine, she chose cardiology as her specialty and received her specialist training at the Cardiology Institute of the same university. In 2015, she was appointed by the university to establish the Şişli Etfal cardiology clinic and Angio laboratory. Becoming a professor in 2017, Kadriye Kılıçkesmez established the cardiology clinic and Angio laboratory of Prof. Dr. Cemil Taşçı Hospital in 2020 and ensured that the clinic became a training clinic.
