The numbness of the patient’s left scalp may be caused by the irritation of the subcutaneous nerves or the constriction of the subcutaneous blood vessels due to the cold and wind blowing after the hair is not dry after washing. In this case, the patient should not be too nervous and can be treated by the following ways: local hot compress, acupuncture, massage to help the patient’s blood recovery and improve the patient’s symptoms. If the patient’s left scalp numbness is caused by microcirculatory disorders and insufficient blood supply to the brain, the patient can be given oral medication to activate blood circulation and improve cerebral blood circulation. For example, take vermifuge snake and tongluo capsule, compound dilong capsule and ginkgo biloba drops orally to improve. If the patient’s scalp is numb on the left side, it is considered to be caused by cervical spondylosis when the neck muscles are tense and pulling on the scalp, and the symptoms can be improved by massage, traction and head acupuncture.