Which condition is NOT typically considered a scalp disorder?

Acne is primarily recognized as a skin condition that affects the face and other areas of the body rather than being classified as a scalp disorder. While it can occur on the scalp, acne is associated with the pilosebaceous unit—hair follicles and sebaceous glands—found throughout the skin. The focus is mainly on its occurrence on the face, back, and shoulders, where sebaceous glands are more active.

On the other hand, dandruff, psoriasis, and folliculitis are directly related to conditions involving the scalp. Dandruff is characterized by the flaking of the scalp and is largely associated with an overproduction of skin cells or fungal infection. Psoriasis is an autoimmune condition that can manifest on the scalp, causing red, inflamed patches with silvery scales. Folliculitis refers to the inflammation of hair follicles, often seen on the scalp, where hair grows and can become infected or irritated. These conditions clearly align with scalp disorders, while acne is more generalized and not limited to the scalp.