A child wakes up crying for no reason, considering the individual physical factors related to, but also may be insecurity, indigestion and other factors triggered. 1. personal body factors, children wake up after sleep if hungry, urine may cause stimulation of the body, resulting in discomfort symptoms, so there will be no reason to cry symptoms. 2. Insecurity, the child wakes up after sleep if there is no one around, may be insecure, so this symptom will appear. 3. Indigestion, if you give a child too much food at once, the child has indigestion, abdominal distension, abdominal pain symptoms may also lead to the child woke up crying for no reason. Children wake up crying for no reason, there may be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause, under the guidance of the doctor to give targeted treatment or treatment.