The baby repeated cough for a month, most of the recurrent colds, need to pay attention to warmth, exercise to enhance immunity; may be cough variant asthma, need to use bronchodilators, antihistamines, glucocorticosteroid drugs, etc.; whooping cough, macrolide antimicrobials; bronchial foreign body, surgical removal. 1. Repeated colds: repeated colds and coughs lasting a long time. Generally viral infections can be self-cured, but it is easy to repeat the infection. Daily attention to keep warm, drink more water, light diet. Strengthen exercise to enhance immunity. 2. Cough variant asthma: all occur at night, with airway hyperresponsiveness. Need to use bronchodilators, salbutamol and so on. 3. Pertussis: manifested as paroxysmal spasmodic cough with chicken-like inspiratory roar, heavy symptoms at night. It is necessary to isolate the patient to avoid contagion, keep indoor ventilation, oral macrolide antibiotics, such as erythromycin, azithromycin and so on. 4. Bronchial foreign body: mostly caused by choking, need bronchoscopy to remove the foreign body. All of the above medications need to be used under the guidance of a doctor to avoid self-medication. The child’s repeated coughing for a month may also be related to other factors, it is recommended to take the child to the hospital in time to identify the cause of the disease and then treatment.