There are many children who have a cough, especially at night, which may affect their sleep. In fact, by identifying the cause and prescribing the right remedy, your child’s cough will be successfully controlled. Cough is one of the most common symptoms of respiratory diseases in children. Under normal circumstances, coughing is a protective physiological phenomenon in babies, an organismic defense reflex action to expel respiratory secretions or foreign bodies. Vagal excitation after night sleep causes an increase in bronchial secretions, which, together with the stimulation of phlegm accumulation while lying down to sleep, leads to a pronounced nocturnal cough. The second is the circadian rhythmical change in hormone secretion of the hypothalamic-pituitary-adrenal axis, which results in a decrease in corticosteroid secretion at night and an increase in the sensitivity of the bronchial lining. Then there are external environmental factors such as decreased air temperature at night and increased concentration of allergens in the bedroom environment, leading to a more intense and frequent cough at night. For mild coughs, cough suppressants are not recommended. Parents can pat the baby’s back more often and change the sleeping position to help expel phlegm, and for severe coughs and wheezes, consult a doctor to try nebulization therapy. If the cough is caused by infection, apply anti-infective drugs under the guidance of a physician. Repeated nocturnal coughs do not exclude cough variant asthma, gastroesophageal reflux, etc. The cough will gradually disappear after giving etiological treatment. Therefore, when your child coughs at night, help your child find the cause in time and treat the cause of the cough such as infection, allergy, airway spasm, environmental irritation, etc. Pay attention to strengthening your child’s health, taking appropriate outdoor exercise, eating a balanced diet, avoiding allergens in children with allergic cough, and going to less crowded public places during the disease epidemic season. The situation is not exactly the same for different babies and must be treated under the guidance of a doctor according to different conditions.