Children coughing in the second half of the night may be related to respiratory tract infection, allergic cough, cough variant asthma and other conditions. 1. Respiratory tract infections: If a child suffers from pharyngitis, tonsillitis or bronchitis, bronchopneumonia, coughing in the second half of the night is likely to occur, at this time the child may also be accompanied by other symptoms, such as nasal congestion, sputum, or fluctuating body temperature. 2. Allergic cough: the environmental factors inside the house stimulate the child to develop an allergic cough, such as pet hair, pollen, etc. can induce the child to develop an allergic cough, which is aggravated in the second half of the night. 3. Cough variant asthma: the child’s cough often occurs at night or early in the morning episodes of cough, aggravated by exercise, sputum less. If a child’s cough is severe in the second half of the night, or the symptoms have not been improved, you should go to the hospital in time for treatment.