Baby coughing in the second half of the night may be caused by hot weather, gastroesophageal reflux, asthma, respiratory infections, bronchitis and so on. 1. Hot weather. Due to the hot weather, the child is not hydrated in time, and the night is dry, which leads to the child’s throat dry and itchy, thus causing a violent cough. 2. Gastroesophageal reflux. The child suffers from gastroesophageal reflux, when sleeping at night, the substance in the stomach will reflux to the esophagus, the esophagus is stimulated, which causes coughing, even choking symptoms. 3. Asthma. Children with asthma, allergic cough, usually leads to irritating dry cough in the middle of the night. 4. Respiratory tract infection. Children with respiratory tract infections, causing coughing, coughing up phlegm and other symptoms. Some children have increased phlegm production at night, which leads to a more severe cough at night. 5. Bronchitis. Bronchitis patients’ bronchial secretions stimulate the vagus nerve at night, leading to increased coughing at night. Baby coughing in the second half of the night may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.