Children waking up vomiting can be caused by indigestion, abdominal cold, allergic rhinitis and other reasons. 1. Indigestion: If a child eats a lot of indigestible food before going to bed, it will cause the food to accumulate in the gastrointestinal tract and cannot be digested, which may lead to the symptom of waking up vomiting. 2. Cold abdomen: If your child gets a cold abdomen while sleeping at night, it can cause abnormal gastrointestinal function, which can lead to vomiting when your child wakes up. 3. Allergic rhinitis: In order to alleviate the discomfort, children often sleep with their mouths open, and the frequent irritation of the throat by the air may lead to vomiting when the child wakes up. The child woke up vomiting may also be caused by other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, give targeted treatment or standardized treatment.