Breathlessness or difficulty in breathing could be due to heart or lung conditions

1. Coronary artery disease (blocked arteries)
2. Heart failure
3. Arrhythmia (abnormal heart rhythm)
4. Heart valve problems
5. Hypertension
6. Congenital heart problems e.g. hole in the heart

1. Bronchospasm (constriction of airways) as in asthma or smoking induced lung disease
2. Pneumonia (lung infection)
3. Pneumothorax (collapsed lung)
4. Pulmonary embolism (blood clot in the lung)
5. Lung fibrosis (hardening of the lungs)
6. Lung cancer
7. Muscle disorders affecting the muscles of breathing

1. Anemia
2. Thyroid problems
3. Obesity
4. Poor physical fitness
5. Anxiety