Itchy and numb scalp can be caused by physiological reasons (such as unclean scalp, etc.) or by pathological reasons (such as herpes zoster, seborrheic dermatitis, tinea capitis, etc.). Different causes, different treatment methods, usually take general treatment, topical drugs and systemic drugs and other treatments. 1. Physiological factors: If you have not been able to clean your scalp for a long time, and your scalp is contaminated by dirt that causes itchy scalp, regular scalp cleaning is recommended. 2. Pathologic factors (1) Herpes zoster: If herpes zoster occurs on the head and face, the skin may have abnormal sensation, itchy and numb. Acyclovir, vasiclovir and other antiviral drugs should be used in a timely manner; blisters can be used externally with glycerine lotion or acyclovir cream; those who cause neuralgia choose non-steroidal anti-inflammatory drugs such as diclofenac sodium for sedation and pain relief, and glucocorticosteroids can be applied to inhibit inflammation at an early stage. (2) Seborrheic dermatitis: it may be related to heredity, microbial infection such as Malassezia, etc. It may be accompanied by itching of the scalp and occasional numbness. It is advisable to use acidic or neutral shampoo, shampoo products containing ketoconazole are beneficial to scalp scaling and itching, avoid alcohol and spicy diet, and limit fat and sugar diet. (3) Tinea capitis: the scalp can be infected by ringworm patients or asymptomatic carriers, and scalp itching and numbness can occur. Tinea capitis patients pay attention to living supplies and barber tools disinfection, will be sick hair cut, with ketoconazole lotion or sulfur soap wash head, at the same time the application of terbinafine cream and other antifungal drugs coated with the affected area, can also be taken orally itraconazole or terbinafine and other drugs. It is recommended that patients with itchy and numb scalp consult a doctor in time to clarify the cause of the disease, and then treat the cause and symptoms.