Chronic bronchitis is the most common cause for chronic cough in middle-aged and elderly persons. It occurs due to chronic inflammation of the medium and large airways of the lungs which transport air both ways in the lungs.

Smoking is the most common cause for chronic bronchitis. But it also occurs due to chronic exposure to various fumes or dust. People working in mines, fields, construction work, are all prone to develop chronic bronchitis, later in life. Women exposed to smoke  for long time, while cooking on charcoal or wood are equally susceptible to develop it.

Most characteristic feature of   chronic bronchitis is chronic cough. It is associated with scanty white colored phlegm, which occurs due to the excess secretions from the inflamed air tubes. The expectoration is maximum in the morning when the individual wakes up.

In case of associated infection, the person can develop fever, chest pain and blood tinged or yellowish green sputum. There is also associated breathlessness, particularly when the person walks.

 Later on, the lungs get hyper inflated due to the stress placed on them to carry out their normal function. The individual though cachexic, has an inflated chest. Due to inefficient ventilation done by diseased lungs, there is chronic deficiency of oxygen in the body. This leads to bluish coloration of the lips and swelling of tips of fingers.

Once chronic bronchitis develops, it is an irreversible condition. Unlike asthma, the closed airways do not open up, when the offending substance is removed. 

Medicines given provide only palliative relief but do not cure the condition absolutely.

If exposure to the causative substance continues, the walls of the airways get damaged and can collapse. At this stage, the affected person gets constant cough with profuse expectoration. 

 Due to  chronic bronchitis one  becomes more prone to infections. The weakened lungs can succumb to tuberculosis also easily. In later age, one can develop lung cancer. 

Chronic bronchitis is diagnosed easily by the  features of chronic cough with expectoration, present recurrently. Lung function tests  show irreversible obstruction of the airways.

Smoking is harmful not only for the lungs but for the entire body, hence smokers should be motivated to quit smoking before they develop chronic bronchitis.

People working in occupations involving chronic exposure to smoke, fumes or dust should be encouraged to cover their noses while working to minimise the inhalation of these harmful substances. They should know about and take treatment at the earliest symptoms .

The government is doing a good job in encouraging people to use  bio-gas for cooking and providing it at affordable cost. This will minimise the chronic exposure to smoke when using charcoal or wood.

Treatment  of chronic bronchitis is mainly directed towards relief of symptoms. Antibiotics are to be used  only if there is evidence of infection. These persons inadvertently undergo X-rays many times and consume a lot of antibiotics. Because they visit the hospitals number of times seeking relief from the cough.

Adequate hydration is useful for the person suffering from chronic bronchitis as it helps to clear the expectoration and reduces cough. Drinking warm water two to three times adds to this benefit of water. 

Different types of breathing exercises of yoga are also useful in increasing the ventilatory function of the lungs in case of chronic bronchitis.

Dr Rachna Pande is a specialist in internal medicine at Ruhengeri Hospital