Coughing during sleep in infants may be caused by airway allergies, gastroesophageal reflux, respiratory tract infections, etc. 1. If the infant is atopic and suffers from allergic rhinitis or airway allergy, he/she will show symptoms such as nasal congestion, runny nose, and violent cough during sleep at night. 2. When an infant suffers from GERD, sleeping in a flat position will easily cause the stomach contents to reflux through the esophagus to the entrance of the airway, stimulating the airway and causing coughing. 3. If the infant’s respiratory tract is infected with mycoplasma or chlamydia, it may show symptoms such as coughing and wheezing at night while sleeping. Infant sleep cough, there may be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.