There are many factors that can cause a baby to cough at night. The most common causes are colds, or upper respiratory tract infections, allergies and dehydration caused by not drinking water in time can also cause a cough. Upper respiratory tract infections are the most common clinical cause of coughing in babies. In addition to a runny nose, sneezing and loss of appetite, the child’s cough should be treated with medication. Consider physiological sea saline nasal wash or adjustment of position and nebulizer treatment. Secondly, there are also some conditions that can lead to severe coughing in babies, such as allergies. If a baby is allergic to something, he or she will have a severe cough. You can consider giving your child appropriate water or oral treatment with oral anti-allergy medication and nebulized inhalation. In addition, drinking little water and eating too salty food before bedtime can also cause nighttime coughing, which can be relieved by drinking more water and watching the diet. Your baby’s body is weak, so if the cold is not treated in time, it may cause fever and bronchopneumonia, so you need to pay special attention to it.