Scalp numbness is very common, the causes are mainly divided into physiological factors and pathological factors. 1. Physiological factors: may be associated with poor sleeping posture, emotional overstress, resulting in head and neck nerve compression, blood circulation and other factors, resulting in the phenomenon of scalp numbness, and can be relieved on their own. 2. Pathological factors (1) cerebrovascular disease: cerebral artery insufficient blood supply, cerebral infarction, cerebral thrombosis, cerebral hemorrhage patients with sensory deficits, some patients with sensory deficits including the head, which will be clinically manifested as numbness of the scalp. Vertebral artery cervical spondylosis will also lead to a decrease in blood supply to the brain, which will indirectly cause symptoms of scalp numbness. (2) Localized nerve compression: the scalp skin sensation is mainly innervated by the trigeminal nerve, and the nerve branches at the scalp include the superior buccal nerve (forehead), supraorbital nerve (frontal), zygomatico-temporal nerve (temporal), auriculo-temporal nerve (periapical), occipital nerve (occipital), and occipital nerves (mastoid + occipital). Injury or entrapment of any of these nerves may result in numbness of the scalp. Numbness of the scalp can also be caused by other reasons, once the symptoms of numbness of the scalp, please consult a doctor in time to avoid delaying the condition.