Children’s bedtime cough is mainly caused by irritation, allergies, respiratory infections, gastroesophageal reflux, improper temperature and humidity of the indoor environment. 1 irritating dry cough: caused by the indoor temperature is too low or too dry, cool wind and so on. 2. Allergies: Children can develop allergies to allergens on bedding sheets (e.g. cotton wool, mites, dust, hair, etc.), which can cause allergic cough. 4. Respiratory infections: Bacterial or viral infections in the throat, bronchial tubes, lungs, etc. can cause coughing symptoms. 5. Gastroesophageal reflux: Children who eat and drink too much at night are prone to gastroesophageal reflux, which can irritate the mucous membrane of the throat or bronchial tubes and cause coughing. Children coughing at bedtime may also be related to other causes, need to go to the hospital in a timely manner for relevant examinations, in order to clarify the cause of the disease, targeted treatment.