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Irritant folliculitis
Medical condition / From Wikipedia, the free encyclopedia
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Irritant folliculitis is an inflammation of the hair follicle.[1] It characteristically presents with small red bumps in the skin at sites of occlusion, pressure, friction, or hair removal; typically around the beard area in males, pubic area and lower legs of females, or generally the inner thighs and bottom.[1][3] An associated itch may or may not be present.[1][2] Pseudofolliculitis barbae is a type of irritant folliculitis in the beard area.[2]
Irritant folliculitis | |
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Pseudofolliculitis barbae: a type of irritant folliculitis | |
Specialty | Dermatology |
Symptoms | Small red bumps in skin[1][2] |
Usual onset | Any age[1] |
Types | Pseudofolliculitis barbae[2] |
Causes | Occlusion, friction, hair removal, application of some medications, contact with irritant chemicals[1][2] |
Risk factors | Obesity[1] |
Diagnostic method | Visualisation, history, negative microbiological culture[3] |
Treatment | Avoid trigger, tetracycline[1] |
Mechanical factors that typically trigger irritant folliculitis include hair removal by razor, waxing, electrolysis, and by plucking.[2] Repeated rubbing of skin such as friction on the inner thighs, may result in the irritation.[3] Sunlight, and prolonged pressure such as sitting on one's bottom for long periods of time, may also trigger irritant folliculitis.[3] Irritant folliculitis may occur following the use of some medications or contact with irritant chemicals such as cutting fluids and coal tar.[3] Tight hair styles may cause irritant folliculitis on the scalp.[4] Other factors that increase chances of skin friction and moisture include obesity.[1]
Diagnosis is generally by history and visualisation of the rash.[3] The condition is not due to infection and swabs of the spots are typically negative.[5] It may appear similar to acne and other types of infectious folliculitis.[6]
Treatment considers removing the triggering factor, particularly to stop shaving.[6] Prolonged use of the antibiotic doxycycline may be an option.[1] If shaving is necessary, the condition may be prevented by avoiding soap and applying a generous amount of shaving gel.[2] Rubbing may be reduced by using powders.[1]
Any age may be affected.[1] It is common on the lower legs of women who shave there.[2]