Bronchitis is an inflammation of the bronchi (lung airways), resulting in persistent cough that produces consideration quantities of sputum (phlegm).
Bronchitis is more common in smokers and in areas with high atmospheric pollution. Chronic bronchitis is a disease in which there is diffused inflammation of the air passages in the lungs, leading to decreased uptake of oxygen by the lungs and increased mucus production.
Bronchitis usually occurs following a viral respiratory infection or with prolonged cigarette smoking. Symptoms can include coughing, shortness of breath, wheezing and fatigue. Acute bronchitis is usually caused by viruses or bacteria and may last several days or weeks. Having recurrent (frequent) bronchitis in the age of 13 is not normal and you need a specialist consultation because it has potentially serious effects.