Some patients with bronchitis will get better on their own. Bronchitis is a self-limiting disease that can be caused by bacteria, viruses, mycoplasma or physicochemical irritation, allergies and other damage to the airway mucosa. Observe for about three days, if coughing and coughing white sputum symptoms are not aggravated, you can continue to observe and see. If the patient has yellow sputum and fever, go to the hospital for further examination, blood tests and lung imaging to clarify the diagnosis and see if it is bronchitis and if there is any infection in the lungs. The treatment of bronchitis is mainly symptomatic, the application of cough, phlegm drugs, to drink more water, eat more vegetables, fruits, appropriate supplementation of vitamin A, vitamin C, vitamin E, vitamin D intake, conducive to the repair of the airway mucosa, while appropriate increase in nutrition, pay attention to rest, avoid staying up late, strenuous, etc..