Four months baby cough can be seen in physiological phenomena, pathological conditions (such as acute upper respiratory tract infections, etc.), what medicine to eat according to the cause of the decision, such as bacterial infections caused by bronchitis can be taken orally, such as cephalosporin treatment. 1. physiological phenomenon: cough is the body’s normal defense mechanism, for four-month-old babies can appear in the morning cough phenomenon, often light, occasional cough, can be discharged through the coughing symptoms of respiratory secretions, is a normal physiological phenomenon. These babies usually have a good mental response, no obvious symptoms of discomfort, no treatment is needed, no oral medication, need to be closely observed. 2. Pathological conditions (1) acute upper respiratory tract infection: mostly caused by viral infections, often self-limiting disease, clinical fever, cough symptoms, in the course of the disease can be oral cough syrup and other treatments. (2) Lower respiratory tract infections: such as acute bronchial, may also appear the above symptoms, may be accompanied by fever, cough sputum unfavorable and other symptoms, the treatment of the use of kratom shellfish to stop coughing, bacterial infections need to be oral antimicrobial drugs (eg, cefaclor) anti-infective treatment. The progress of the disease should be closely observed, and if the treatment is unsatisfactory, intravenous fluids and other treatments are needed if necessary. All of the above medications should be used under the guidance of a physician, and it is recommended to actively seek medical advice from a specialist.