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Poliosis circumscripta, commonly referred to as a "white forelock", is a condition characterized by localized patches of white hair due to a reduction or absence of melanin in hair follicles. Although traditionally associated with the scalp, poliosis can affect any hairy area on the body, including eyebrows, eyelashes, and beards.
The most common form, seen in infants, is an infantile hemangioma, known colloquially as a "strawberry mark", most commonly presenting on the skin at birth or in the first weeks of life. A hemangioma can occur anywhere on the body, but most commonly appears on the face, scalp, chest or back.
Hair diseases are illnesses that impact the persistence and regular growth of hair. Types of hair diseases include folliculitis , hirsutism , hypertrichosis , hypotrichosis ( alopecia ), Menkes kinky hair syndrome , monilethrix , and piedra .
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. Scarring and permanent hair loss ...
The underlying skin is unscarred and looks superficially normal. Although these patches can take many shapes, they are usually round or oval. [19] Alopecia areata most often affects the scalp and beard, but may occur on any part of the body with hair. [20] Different areas of the skin may exhibit hair loss and regrowth at the same time.
Tufted folliculitis presents with doll's hair-like bundling of follicular units, and is seen in a wide range of scarring conditions including chronic staphylococcal infection, chronic lupus erythematosus, lichen planopilaris, Graham-Little syndrome, folliculitis decalvans, acne keloidalis nuchae, immunobullous disorders, and dissecting cellulitis.
Cherry angioma, also called cherry hemangioma [1] or Campbell de Morgan Spot, [2] is a small bright red dome-shaped bump on the skin. [3] It ranges between 0.5 – 6 mm in diameter and usually several are present, typically on the chest and arms, and increasing in number with age. [3] [4] If scratched, they may bleed. [5]
The hair is seen under a microscope with bumps in the hair strand. These cause the hair to be brittle and break in the thinner sections. Severe cases of monilethrix can also affect finger and toe nails causing abnormal growth. Monilethrix can also cause keratosis pilaris (small bumps on the skin). Less severe cases of Monilethrix may only ...