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Miliaria, commonly known as heat rash, sweat rash, or prickly heat, [1] is a skin disease marked by small, itchy rashes due to sweat trapped under the skin by clogged sweat-gland ducts. Miliaria is a common ailment in hot and humid conditions, such as in the tropics and during the summer. [ 2 ]
Fox–Fordyce disease (FFD) is a chronic blockage of the sweat gland ducts with a secondary, non-bacterial inflammatory response to the secretions and cellular debris in the cysts. [1]
Folliculitis is the infection and inflammation of one or more hair follicles.The condition may occur anywhere on hair-covered skin.The rash may appear as pimples that come to white tips on the face, chest, back, arms, legs, buttocks, or head.
The pathogenesis of pseudopelade of Brocq is still not well understood. A number of potential contributing variables include senescence of the follicular stem cell reserve, acquired autoimmunity, and Borrelia infection. [3]
A comedo (plural comedones) is a clogged hair follicle (pore) in the skin. [2] Keratin (skin debris) combines with oil to block the follicle. [3] A comedo can be open (blackhead) or closed by skin (whitehead) and occur with or without acne. [3]
Relative incidence of cutaneous cysts. Milia is labeled at bottom right.. A milium (pl.: milia), also called a milk spot or an oil seed, [1] is a clog of the eccrine sweat gland.
Lupus miliaris disseminatus faciei (LMDF), also known as acne agminata, is a disease with a similar appearance to acne vulgaris. [1] [2] The cause of LMDF is unknown.LMDF usually occurs on the face, but extrafacial presentations have been reported.
It's unclear what causes erosive pustular dermatitis of the scalp. It is believed that actinic damage and epidermal atrophy are risk factors. Many other factors, such as different topical drugs, infections, surgical operations, or topical agents, have been linked to the beginning of the illness; their direct role in the etiology is unknown.