Feeling short of breath constantly, also called dyspnea, can be caused by a variety of physical or emotional conditions. It may come on suddenly or develop over time and should not be ignored, especially if it’s persistent or worsening.

Common Causes of Shortness of Breath

1. Lung Conditions
Asthma – airways become inflamed and narrow
COPD – long-term lung damage from smoking or pollution
Pneumonia – infection causing lung inflammation
Pulmonary fibrosis – scarring of lung tissue
Pulmonary embolism – blood clot in the lungs

2. Heart Conditions
Heart failure – weakened heart can’t pump enough blood
Arrhythmia – irregular heartbeat affecting circulation
Coronary artery disease – reduced blood flow to the heart

3. Anemia
Low red blood cell count means less oxygen is carried in the blood, causing breathlessness

4. Anxiety or Panic Attacks
Stress and anxiety can make you breathe faster or feel like you can’t get enough air

5. Obesity or Poor Fitness
Excess body weight or low physical fitness can put strain on breathing

6. Allergies or Airway Irritation
Exposure to allergens, smoke, or pollution may trigger breathing difficulties

7. COVID-19 or Long COVID
Some people experience lasting breathlessness even after recovering from the virus

When to See a Doctor
If shortness of breath is frequent, worsening, or occurs at rest
If it’s accompanied by chest pain, dizziness, swelling, or fatigue
If it started suddenly or interferes with daily activities

Diagnosis and Tests
Your doctor may do a physical exam and order tests like chest X-ray, ECG, blood tests, lung function tests, or CT scans to find the cause