If there is pain in the hair root, first look for boils and folliculitis in the hair root near the area of pain, as localized infections of the skin, boils and folliculitis can cause pain in the hair root. In another case, look for a series of small blisters around the painful area. If a series of blisters come out, it may be a kind of herpes zoster virus infection, which can cause pain in the hair root area. This pain usually manifests as paroxysmal throbbing, scattered pain and requires antiviral, neuroprotective medication. If the surface of the skin is fine, there are no growths or boils, and there is simply pain in the roots of the hair, it is a type of scalp nerve pain. The cause of scalp nerve pain is related to cold, wind, flu, etc. Sometimes it is easy to have nerve pain when the weather is cold and the hair is not blown dry immediately after washing and is stimulated by cold wind. This situation is generally temporary, just need to pay attention to keep warm, slowly symptoms will improve.