Usually like to sleep on their stomachs for the following reasons: 1, plant nerve dysfunction often in the presence of excessive nervousness, excessive sleep, anxiety, agitation, poor quality of rest and sleep or in the short term sleep phase shortened, deep sleep phase time shortened and sleep phase prolonged patients will appear like to sleep on their stomachs clinical symptoms and performance. 2, in patients with psychological disorders, such as panic, psychological 3, for example, patients with epilepsy, Parkinson’s disease, abnormal increase in brain nerve address or abnormal neuronal discharge will like to sleep on their stomachs when sleeping, and will quickly go to sleep and dreamland.