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Overview. Acne is a skin condition characterized by clogged pores. When pores get clogged, it causes red lesions — which you know as pimples — to form on the face or other areas of the body ...
Acneiform eruptions differentiate themselves from acne vulgaris by a history of sudden onset, a monomorphic morphology, eruption development at any age, affecting the trunk more frequently than the face, not always affecting sebaceous areas of the body, and the rarity of cyst formation.
Acne (/ˈækni/ ACK-nee), also known as acne vulgaris, is a long-term skin condition that occurs when dead skin cells and oil from the skin clog hair follicles. [10] Typical features of the condition include blackheads or whiteheads , pimples , oily skin, and possible scarring .
Acne with facial edema occurs uncommonly, and is associated with a peculiar inflammatory edema of the mid-third of the face. [3] The exact cause of edema in relation to acne is unknown. Treatment includes facial stockings as well as a combination of prednisone and isotretinoin .
The inflammatory processes lead to the formation of keratinous plugs in skin pores, forming yellowish cysts and dark pustules. The associated pus is usually a color of green approximating that of a tennis ball. The skin lesions occur mainly in the face, but in more severe cases they involve the shoulders and chest, the back, and the abdomen.
The two main types of human skin are: glabrous skin, the hairless skin on the palms and soles (also referred to as the "palmoplantar" surfaces), and hair-bearing skin. [3] Within the latter type, the hairs occur in structures called pilosebaceous units , each with hair follicle , sebaceous gland , and associated arrector pili muscle. [ 4 ]
The scalp, ears, back, face, and upper arm, are common sites of sebaceous cysts, though they may occur anywhere on the body except the palms of the hands and soles of the feet. [4] They are more common in hairier areas, where in cases of long duration they could result in hair loss on the skin surface immediately above the cyst. They are smooth ...
Relative incidence of cutaneous cysts, where epidermoid cysts constitute a plurality (blue area). An epidermoid cyst or epidermal inclusion cyst [1] is a benign cyst usually found on the skin. The cyst develops out of ectodermal tissue. Histologically, it is made of a thin layer of squamous epithelium.