The pattern of coughing in patients with bronchitis is a single dry cough that gradually becomes a more frequent dry cough, then phlegm begins to appear, there is a phlegm sound in the throat, and the cough becomes a wet cough and more frequent. With treatment and time, the cough gradually decreases and the phlegm sound in the throat subsides, lasting about a week. The causes of bronchitis are viruses, bacteria, mycoplasma and chlamydia, and anti-infective treatment is given to target the pathogen. Symptomatic treatment, that is, expectorant and cough suppressant, can be done with bronchodilators or mucus thinners. General treatment includes rest and nutrition, ensuring adequate rest and sleep, and a diet that is easy to digest and rich in nutrients, and active cooperation with the doctor.