What is the cause of scalp pimples

Scalp long pimples, there are the following three conditions most common: 1, seborrheic dermatitis. Scalp scattered in the long pimples, seborrheic dermatitis is the greatest possibility, it is abnormal androgen secretion, sebum increase, hair greasy, some fungal infections, showing scattered scalp erythema, maculopapules, itching. 2, folliculitis. Folliculitis is involved in hair follicles and their surrounding tissues bacterial infectious skin disease, local pain and mild itching. 3, psoriasis. Psoriasis often starts from the scalp, and then spreads to the trunk and limbs will show. These three conditions, generally do not need to do any examination, but specialists must see face to face, with experience and simple small tests to diagnose, only convenient treatment.