<unk>  is a skin disease caused by changes in the pilosebaceous units (skin structures comprising a hair follicle and its related sebaceous gland). Severe<unk>  is inflammatory, but<unk>  can also manifest in noninflammatory forms.<unk>  lesions are defined as pimples, spots, or zits. <unk>  diminishes with age, by early twenties<unk>  disappears. There is no set age for<unk>  to disappear, some individuals have<unk>  decades later, into their thirties and forties and even beyond.
The term<unk>  comes from a Greek word άκμή (acme in the sense of a skin eruption) in the writings of Aëtius Amidenus. The vernacular term bacne or backne is often used to show<unk>  found specifically on one's back.
Acne vulgaris
Lupus vulgaris
Ichthyosis vulgaris
Sycosis vulgaris
Vitiligo
Alopecia mucinosa
Tinea corporis
Lichen nitidus