Acute bronchitis is an acute inflammation of the bronchial mucosa caused by various factors, and is a type of bronchitis, often with acute onset. The onset of the disease is often characterized by upper whistle infection, dry cough, nasal congestion, runny nose, sore throat, hoarseness, etc. It is also accompanied by symptoms such as low fever, fear of cold, malaise, cough, and phlegm that cannot be easily coughed out. Systemic symptoms may improve or disappear within 3-5 days, but the cough may last longer. Patients may inhale cold air or irritating odors to trigger or intensify the cough, which may lead to nausea and vomiting and chest muscle pain when the cough is intense. Dry rales can be heard on auscultation of the lungs. Chest radiographs are usually unremarkable and the blood picture is not high. Treatment is mainly symptomatic. Patients with a severe cough with little sputum are given cough suppressants; patients with sputum or sputum that is not easily coughable are treated with phlegmolytic drugs. Antibiotic treatment is not recommended for patients without clear evidence of bacterial infection. Generally, acute bronchitis can be cured by itself after a period of time through the operation of its own immune system. In summary, acute bronchitis is an acute inflammatory disease with coughing and sputum as the main symptoms, which is self-limiting and generally has a good prognosis.