Children’s fast dawn cough is usually caused by conditions such as cough variant asthma, bronchitis, and gastroesophageal reflux disease. 1. Cough variant asthma: Cough variant asthma is mostly triggered by exposure to cold air or allergens, and the cough lasts for a long time, often in the early morning dry cough. Children’s fast dawn cough may be caused by exposure to cold air. 2. Bronchitis: If a child has an attack of bronchitis due to an infection, he or she may also cough at dawn. 3. Gastroesophageal reflux disease (GERD): irritation of the esophageal mucosa by reflux, resulting in esophageal reflux stimulating receptors that reflexively cause bronchospasm, may cause coughing at dawn in children, usually accompanied by vomiting, sleep disturbance and other symptoms. There may be other causes for children’s coughing, it is recommended to go to the hospital in time, complete the examination to clarify the cause of the disease, and with the help of the doctor to give targeted treatment or therapy.