A baby with a cold and a strong cough at night is a normal phenomenon caused by a cold, but it can also be caused by dry air, dust and other environmental factors. It may also be due to the complication of cough variant asthma and other diseases, as well as other diseases such as pneumonia. 1 Colds: When a child with a cold develops a cough, it is due to bacterial or viral infections, which can lead to respiratory irritation and coughing, which is a normal phenomenon caused by colds. 2. Environmental factors: If a child with a cold sleeps in an environment that is too dry, it can lead to dryness in the child’s nasal passages and throat, which can lead to a strong cough. In addition, there may also be dust in the child’s environment, which can be inhaled while the child sleeps, and can stimulate the child to cough. 3. Cough variant asthma: The cause of cough variant asthma has not been clearly defined, and it is considered to be caused by genetic and environmental factors. The child will have an irritating dry cough, especially in the early hours of the night, and will also have symptoms such as wheezing, chest tightness, and tightness of breath. If a child with a cold has cough-variant asthma, the child may have a severe cough at night. 4. Other: If a child with a cold is complicated by pneumonia, allergic cough, bronchitis and other diseases, there will also be a strong cough at night. Coughing at night is usually a normal symptom of colds, but it can also be caused by the environment or other diseases, parents should take their children to the doctor in time, and follow the doctor’s instructions.