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Telogen effluvium is a scalp disorder characterized by the thinning or shedding of hair resulting from the early entry of hair in the telogen phase (the resting phase of the hair follicle). [ 1 ] [ 2 ] [ 3 ] It is in this phase that telogen hairs begin to shed at an increased rate, where normally the approximate rate of hair loss (having no ...
Pityriasis amiantacea affects the scalp as shiny asbestos-like (amiantaceus) thick scales attached in layers to the hair shaft. [3] The scales surround and bind down tufts of hair. [ 4 ] The condition can be localised or covering over the entire scalp.
The scalp is the most common pulling site, followed by the eyebrows, eyelashes, face, arms, and legs. [10] Some less common areas include the pubic area, underarms, beard, and chest. [11] The classic presentation is the "Friar Tuck" form of crown alopecia (loss of hair at the "crown" of the head, also known as the "vertex"). [12]
There have been many different theories regarding the causes of excoriation disorder, including biological and environmental factors. [10]A common hypothesis is that excoriation disorder is often a coping mechanism to deal with elevated levels of turmoil, boredom, anxiety, or stress within the individual, and that the individual has an impaired stress response.
Cutis verticis gyrata is a medical condition usually associated with thickening of the scalp. [1] The condition is identified by excessive thickening of the soft tissues of the scalp and characterized by ridges and furrows, which give the scalp a cerebriform appearance. Clinically, the ridges are hard and cannot be flattened on applying pressure.
Generally, diseases outlined within the ICD-10 codes L60-L75 within Chapter XII: Diseases of the skin and subcutaneous tissue should be included in this category. Wikimedia Commons has media related to Disorders of skin appendages .
Pseudofolliculitis barbae is a disorder occurring when hair curves back into the skin and causes inflammation. Eosinophilic folliculitis may appear in persons with impaired immune systems. Folliculitis decalvans or tufted folliculitis usually affects the scalp. Several hairs arise from the same hair follicle.
Clinical symptoms of the disorder arise between 3 months and 12 years of age. The quantity of hair on the head does not change, but hair starts to grow more slowly and becomes increasingly "uncombable". To be clinically apparent, 50% of all scalp hair shafts must be affected by UHS.