The reasons for the recent total desire to sleep consider the following: 1, may be caused by fatigue, if patients work for a long time more nervous, stressful, easy to cause the brain and body in a state of extreme fatigue. When the patient is emotionally relaxed, he or she will be sleepy and tired, which is a normal physiological reaction. 2, always want to sleep to pay attention to whether the patient is poor sleep quality at night, or often stay up late, resulting in the patient’s sleep length is not enough, sleepy during the day, always want to sleep performance. The patient should also pay attention to the presence of sleep apnea syndrome at night, so that the brain is in a state of chronic ischemia and hypoxia, resulting in the total desire to sleep. 3, consider that the blood may be in a high-fat, high-viscosity state and cause slow cerebral blood flow, resulting in insufficient blood supply and oxygen supply to the brain, so that the patient always wants to sleep, accompanied by drowsy performance.