Cough of three-year-old baby after falling asleep may be caused by respiratory tract infection, cough variant asthma, allergic cough and other reasons. It is recommended that you take your child to the hospital for examination to determine the cause and carry out corresponding treatment. At the same time, you can pay attention to the following points:

1. Keep indoor air circulation to avoid dust and odor;

2. Don't let children eat too much food before going to bed, especially spicy and irritating food;

3. You can give your child some warm water or warm water before going to bed, which will help relieve cough;

4. You can give your child some simple massages before going to bed, such as gently patting your back.