The symptoms of acute bronchitis in adults are mainly the initial cicatricial symptoms of upper respiratory tract infection, such as nasal congestion, runny nose, sneezing, which may be accompanied by a mild cough. As the symptoms worsen, after about 2-3 days, significant coughing and coughing of sputum will occur. The sputum may change from clear sputum to purulent, sticky sputum, and may be accompanied by chest tightness, chest pain, shortness of breath, shortness of breath, and in severe cases, dyspnea, and even a tendency of fever and high fever that does not subside. It is necessary to test the blood routine in time, and if necessary, take X-ray and CT of both lungs to clarify the condition and cause, and carry out symptomatic and etiological treatment.