There are many factors that can cause a baby to cough in the middle of the night without coughing during the day, and whether or not it can heal itself is related to the trigger of the cough. It is recommended that parents do their best to protect their lives and take their children to the doctor for examination if necessary to clarify the cause. If it is an external factor, such as the air, temperature, presence of dust and sleeping position, it can heal itself with the right prevention. The first thing to consider when a child coughs in the middle of the night is whether there is air pollution because children’s respiratory organs are more sensitive than adults and perhaps parents do not feel it, but some air pollutants can cause a baby to cough constantly. Secondly, you should also pay attention to the change in humidity in the air, especially in the middle of the night when you will turn on the air conditioner or heater will make the air humidity drop and the dry air will make the child trigger a cough. If the bedding is not cleaned, dust, dander, dust mites and stuffed toys can also make sensitive babies and children cough all the time. In addition, lying flat may also make your baby cough strongly. During the day, children are in an upright position, and movement and swallowing reduce the mucus in the throat, but the faster accumulation of respiratory mucus in a flat state can trigger the appearance of a cough. If it is found to be caused by external factors, it should be corrected promptly. If these measures are not effective in treating your child’s cough, you should consider it to be caused by pathological factors and take your baby to the hospital for an examination to confirm the diagnosis.