Complications of acute bronchitis are rare, and some patients may develop complications of pneumonia. When a patient suffers from acute bronchitis, symptoms of upper respiratory tract infection such as nasal congestion, runny nose and sore throat may appear first, followed by coughing and sputum symptoms, and systemic symptoms such as fever. However, acute bronchitis patients usually do not have serious complications, only a few patients may be complicated by pneumonia, most patients have a good prognosis, a few weak patients may be prolonged and develop into chronic bronchitis. When the symptoms of acute bronchitis are serious, patients need to be actively treated under the guidance of the doctor, and in daily life need to rest, pay attention to warmth, drink more water.