The causes of sleep paralysis are as follows: 1. Episodic sleeping sickness: it is a kind of rare disease in the past, but nowadays this kind of patients will appear in the clinic from time to time. This disease mainly occurs most often in adolescence, manifested as unstoppable sleepiness during the day, repeated episodes, while the patient will also appear in the excitement or excitement of sudden collapse, that is, the body goes limp. In addition, patients often have nightmares at night, combined with hallucinations or hallucinations, so the experience is more painful; 2, anxiety, depression people: sleep paralysis episodes are also higher; 3, excessive fatigue: sleep paralysis may occur in the morning the next day; 4, obstructive sleep apnea syndrome: the patient because of the disease affects the sleep at night, resulting in fatigue, and recurring hypoxia phenomenon, this kind of patients sometimes also occur sleep paralysis.