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Demodex is the name given to tiny mites that live in the hair follicle. In humans, demodex is found on facial skin, especially the forehead, cheeks, sides of the nose, eyelashes and external ear canals. It sometimes causes a condition called demodicosis. There are two mites principally involved in human demodex infestations, Demodex ...
Scalp folliculitis is an inflammatory disorder of the hair follicles in the scalp. The condition is also known as "acne necrotica miliaris" or "Proprionibacterium folliculitis". Scalp folliculitis is characterised by small, very itchy pustules on the scalp, often most troublesome on the frontal hairline. There may be only a small number of ...
Folliculitis on the face or scalp of older or immunosuppressed adults may be due to colonisation by hair follicle mites (demodex). This is known as demodicosis. The human infestation, scabies, often provokes folliculitis, as well as non-follicular papules, vesicles and pustules. Folliculitis due to irritation from regrowing hairs
Eosinophilic pustular folliculitis presents with itchy red or skin-coloured dome-shaped papules and pustules. It may look like acne or other forms of folliculitis. The papules mostly appear on the face, scalp, neck and trunk and may persist for weeks or months. Less commonly, urticarial lesions are seen (these are larger red irritable weal ...
Demodex folliculitis: May be suspected if treatment for facial acne is failing to improve symptoms. More common if you have a weakened immune system. Demodex folliculitis producing a rosacea-like rash on the face. Folliculitis barbae. Distribution /location: folliculitis barbae comes up in areas prone to shaving eg, beard area.
Malassezia folliculitis, also known as pityrosporum folliculitis, is an infection of the pilosebaceous unit caused by lipophilic Malassezia yeasts particularly M. globosa, M. sympodialis and M. restricta. Malassezia yeast are normal inhabitants of the human skin surface and only cause disease under specific conditions.
It may be more difficult and under-recognised in patients with skin of colour. Rosacea has been associated with depression, hypertension, cardiovascular diseases, anxiety disorder, dyslipidemia, diabetes mellitus, migraine, rheumatoid arthritis, Helicobacter pylori infection, ulcerative colitis, and dementia.
Histology Special studies Differential diagnosis. Demodicosis is caused by two species of follicular mites, Demodex folliculorum and Demodex brevis, which are normal inhabitants of human skin. Although the mites are ubiquitous on sebaceous -rich skin, they sometimes cause dermal reaction and consequent erythema, pustules, and inflammatory plaques.
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Cutaneous features of periorificial dermatitis include: An acneiform eruption. Clusters of skin-coloured to red papules, vesicles, and pustules. Usually less than 2mm each; may coalesce into larger lesions. Erythematous base with a sharp border. Surrounding skin is often dry. Scaly and flaky skin surface.