Coughing after a baby falls asleep is mostly caused by respiratory diseases or digestive tract diseases, and there are generally the following cases. 1. Acute upper respiratory tract infection, commonly known as a cold, is the most common disease in children, with uncomfortable symptoms such as runny nose, dry cough and sore throat, while the baby falls asleep at night and coughs, in addition to coughing symptoms because of the disease itself, it may also be because lying flat at night is the backflow of secretions from the nasal cavity into the pharynx, causing a cough. 2. Acute infectious laryngitis, which is characterized by a cough like a dog’s bark, fever, hoarseness, inspiratory laryngeal tinnitus and trigeminal signs, is generally mild during the day and worsens at night after falling asleep. In severe cases, the child can die of asphyxiation, which requires parents to pay great attention. Bronchial asthma is the most common chronic respiratory disease in childhood, with recurrent coughing and wheezing as the main symptoms, mainly at night and early in the morning. Some children with cough variant asthma only have recurrent nighttime or early morning coughs. 4. Sinusitis or postnasal drip, if the baby has this disease, the sinus secretion increases during sleep and flows along the back wall of the throat to the pharynx, which will stimulate the baby to cough. 5, In addition, some other respiratory inflammatory diseases, such as pneumonia and bronchitis, have coughing symptoms, which can cause your baby to cough after falling asleep. 6. Nighttime coughs should also be aware of digestive tract diseases such as gastroesophageal reflux, which is caused by the reflux of food from the stomach to the throat and causes coughing. In conclusion, coughing after a baby falls asleep is mostly indicative of some respiratory diseases, but individually it may also be caused by digestive tract diseases. It is recommended that parents pay attention to this symptom and seek medical attention as soon as possible, so as not to delay the condition.