Bronchitis is an inflammation of the pulmonary system; an upper respiratory infection. The infection to the bronchi causes them to become irritated and inflamed. The cough may last for several weeks after the other symptoms have gone. The most noticeable symptom is a hacking cough. The patient may bring up clear, yellow-grey or greenish phlegm, or mucus.
As in the common cold other symptoms may include: sore throat ; headaches and tiredness. When the hacking cough persists after something like three weeks after onset, the patient will be considered to be suffering from chronic bronchitis, the lower respiratory system being affected.
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