When you touch your hair and your scalp hurts, consider the following disease possibilities: 1. Herpes zoster: can occur on a unilateral scalp area, in addition to the pain is not seen on the skin surface erythema, blisters such rash, can be caused by varicella-zoster virus infection. The rash can be caused by the varicella-zoster virus infection. In terms of treatment, you can take oral vaxilovir hydrochloride pellets or acyclovir tablets, and if the pain is severe, you can take oral pregabalin capsules for pain relief. 2. Streptococcus haemolyticus infection: there can be well-defined edematous erythema, on which there can be tiny blisters, and after scratching, vesicles and oozing. In terms of treatment, you can order penicillin sodium injection or cefothiamidine injection, and apply topical fusidic acid ointment for treatment.