In general, this situation is usually considered to be caused by upper respiratory tract infection, which is often referred to as a cold, but also allergies, drinking less water and other lifestyle habits can also lead to. First of all, because babies are relatively young, the upper respiratory tract is weak, so if there is a viral infection, a series of symptoms of upper respiratory tract infection will easily appear, the first of which is runny nose and other manifestations. If the baby’s condition worsens further, clinical manifestations such as coughing, sneezing, runny nose and even fever will appear, so it is important to actively control the condition. The child’s coughing at night may be related to factors such as postnasal drip or increased secretion of respiratory glands at night, so attention should be paid to treatment such as physiological sea saline nose wash or adjustment of body position and nebulizer treatment. Secondly, allergic diseases can also lead to coughing, but this cough is usually non-sputum, with obvious episodes at night, mainly dry cough, and frequent episodes of paroxysmal coughing, so you can consider giving your child appropriate water or oral treatment with oral anti-allergy drugs and nebulized inhalation. In addition, drinking little water and eating too much salty food before going to bed can also lead to nighttime coughing, which can be relieved by drinking more water and watching the diet.