Patients with mild restriction of airflow in small airways may be caused by bronchitis, asthma and other diseases, coughing and coughing up phlegm, shortness of breath, chest tightness and other symptoms, can be treated with medication and physical therapy. 1. Medication: small airway airflow mildly restricted, bronchitis patients can use dextromethorphan, pentoxyverine and other drugs to stop coughing and phlegm treatment. Asthma patients can use albuterol, budesonide inhaler and other drugs for treatment. 2. Physical therapy: Oxygen therapy can be given to improve the mild restriction of small airway airflow. Patients with mild restriction of airflow in small airways are advised to go to the hospital in time, and standardize the treatment according to the doctor’s instruction after clarifying the cause of the disease. During the treatment period, avoid eating cold and irritating foods, and do not overwork.