Today, bronchitis is considered as one of the most common diseases in the world. Usually, people who suffer from bronchitis are people who have weak respiratory system. Infants, children, the elderly and people who smoke tobacco are the ones usually affected by this disorder.

Bronchitis is the infection of the bronchi. Usually, the main causes of bronchitis are virus infection, bacteria infection or in rare cases, bronchitis can be caused by fungus infection in the bronchial tree. This illness comes into two main classifications. The first one is acute (small-term) bronchitis, and the second one is chronic (long-term) bronchitis.

There are basically two kinds of bronchitis, acute and chronic bronchitis. These two may have the same last names but they vary from their causative effects and treatment prescribed to control the diseases.

Acute bronchitis is a small-term illness that becomes rampant during the cold seasons. It is usually followed by a viral infection and can go together with a bacterial infection. Acute bronchitis is self-limiting which clears itself within fourteen days but the cough may continue. Like any other upper respiratory tract infections, having acute bronchitis can raise chance of developing pneumonia.

Inflammation of the respiratory tract that includes the trachea and the bronchus is known as bronchitis. This may be caused by viral or bacterial infection or constant exposure to pollutants (such as smoking and air pollution). There are two kinds, acute and chronic bronchitis.

Acute bronchitis usually takes place right after an infection of the upper respiratory tract has occurred like a sinus infection or the common cold. As for chronic bronchitis, there is no exact microorganism that can be pinpointed as a cause but smoking and environmental pollutants are believed to be the major culprits which then may be followed by bacterial or viral infection as the immune system becomes vulnerable.