Sleeping up the left side of the head numb: 1, can be considered due to prolonged pressure on the left side of sleep, poor local circulation, after massage can be alleviated. 2, sleep due to improper posture led to the left scalp fascia or muscle strain, causing spasm and head numbness, when serious can also be accompanied by headache, if necessary, the patient can be given acupuncture massage to improve the head numbness. 3, sleeping up the left side of the head numbness also May be caused by cerebrovascular disease, especially in the elderly due to the slowdown of blood circulation during sleep, the patient can suddenly develop ischemic cerebrovascular disease. When ischemic cerebrovascular disease occurs, the patient can have symptoms of neurological deficits, such as numbness on the left side of the head, and in severe cases, it can also be accompanied by numbness on the left side of the body, and if necessary, the patient is advised to consult a neurologist.