Numbness at the top of the head may be related to poor quality of sleep at night, extra dreams, or frequent late nights, lack of sleep time, resulting in brain ischemia, lack of oxygen and numbness symptoms. Numbness in the top of the head may be related to abnormal blood pressure if it is accompanied by headache, change of position, or aggravation of symptoms when there is a change in mood. Patients with diabetes, unstable blood sugar control or complications may also cause numbness in the top of the head. If there is frequent dizziness and headache with limited movement of limbs, it may be related to cerebral blood supply deficiency, cerebral atherosclerosis, cerebral thrombosis, cerebral infarction and other diseases. Cervical spine disease and insufficient blood supply to the basilar artery may also cause numbness in the top of the head, so you can go to the hospital for examination to determine the cause before treatment.