Children coughing for almost a month can be seen in recurrent respiratory infections, cough variant asthma or tracheal foreign bodies, etc., need to be treated according to the cause. 1. Recurrent respiratory infections: When parents do not follow the doctor’s instructions for a full course of medication, or due to the child’s own weak immune system and other factors, recurrent respiratory infections, during which the cough may recur. These children need to pay attention to daily physical fitness, nutrition and reasonable diet, and at the same time need to follow the doctor’s instructions to standardize the course of medication. 2. Cough variant asthma: due to increased airway responsiveness, recurrent cough, cough duration is longer, mostly dry cough, often at night and early morning attacks or aggravation, the use of antibacterial drugs treatment is ineffective. Treatment can use budesonide for nebulization, oral montelukast and other drugs, need regular follow-up, follow the doctor’s instructions to adjust the dose of drugs. 3. Tracheal foreign body: these babies may have a history of foreign body choking and coughing, and the above phenomenon may occur. For this kind of children need to carry out tracheoscopic foreign body removal surgery, if secondary infection, need to use antibacterial drugs (such as cefaclor) anti-infection treatment. 4. Others: Sinusitis can also be associated with a prolonged cough, which is usually caused by the backflow of nasal mucus that irritates the respiratory tract. Treatment requires the use of amoxicillin and other anti-infective, mometasone furoate (for children over 3 years old) and other local nasal spray treatment. Cough is only a symptom, should be clear in time to cause the specific causes of coughing in children, for the cause of the treatment is the root of the treatment, the specific treatment needs to follow the doctor’s instructions. All of the above medications should be used under the guidance of a doctor, avoid self-medication.