Children who do not cough during the day and cough hard at night are mainly related to upper respiratory tract infections, allergic cough, pneumonia and other reasons, mainly to drug treatment. 1. Upper respiratory tract infections: caused by viral or bacterial infections, which stimulate the respiratory tract and cause tickling of the throat, resulting in children coughing at night. Generally can be self-cured, do not need special medication; if the combination of bacterial infection, you need to take amoxicillin and other antibiotics. 2. Allergic cough: due to children belonging to the allergic body, after contact with allergens, allergic reactions, night exposure to allergens, thus causing children cough at night. It can be treated with medication, such as loratadine. 3. Pneumonia: Inflammation of the lung tissue, causing swelling, pathogens with breathing from the lungs to the throat stimulation, children cough at night. Due to the fresh air at night, breathing more, thus causing a cough at night, can be treated by penicillin, azithromycin and other drugs. All of the above medications should be used under the guidance of a doctor, avoid self-medication. Children who do not cough during the day and cough at night may also be related to other diseases, it is recommended to go to a professional hospital, to clarify the cause of the disease under the guidance of the doctor for further examination and treatment.