Redness and pain on the surface of the scalp can occur due to a number of factors. When the skin is exposed to hot water or other boiling liquids or solids, scald-like changes can occur, and the skin can become red and painful, as well as burning and numbness. You can choose to use cold water rinse, if necessary, you can choose to apply moist burn cream, if the local in addition to redness, pain, but also ulceration-like changes, need to implant treatment, if the scalp area redness, pain, no other conscious symptoms, and no obvious cause, consider may be infected with varicella-zoster virus caused by atopic herpes zoster, you can choose to take oral vitamin B with Vaxilovir hydrochloride can be used for treatment. If the scalp area is red and painful, there will also be red papules with small pus seen on top, consider folliculitis in the scalp area, and you need to choose topical metronidazole gel.