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The Fischer–Saller scale, named after Eugen Fischer and Karl Saller is used in physical anthropology and medicine to determine the shades of hair color. The scale uses the following designations: A (very light blond), B to E (light blond), F to L (), M to O (dark blond), P to T (light brown to brown), U to Y (dark brown to black) and Roman numerals I to IV and V to VI (red-blond).
Trichobacteriosis axillaris is a superficial bacterial colonization of the hair shafts in sweat gland–bearing areas, such as the armpits and the groin. It is a trivial disease of worldwide occurrence that is believed to be caused by the genus Corynebacteria .
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.
When the hairs break off at the opening of the follicle, black dots remain. Favus is caused by T. schoenleinii , and is endemic in South Africa and the Middle East. It is characterized by a number of yellowish, circular, cup-shaped crusts ( scutula ) grouped in patches like a piece of honeycomb, each about the size of a split pea, with a hair ...
In many patients, hair loss and regrowth occurs simultaneously over the course of several years. [7] Among those in whom all body hair is lost, fewer than 10% recover. [18] About 0.15% of people are affected at any one time, and 2% of people are affected at some point in time. [7] [18] Onset is usually in childhood. [7]
Brown hair, also referred to as brunette (when female), is the second-most common human hair color, after black hair. It varies from light brown to dark hair. It is characterized by higher levels of the dark pigment eumelanin and lower levels of the pale pigment pheomelanin .
Rosacea. What it looks like: Rosacea causes redness and thick skin on the face, usually clustered in the center.Easy flushing, a stinging sensation, and small, pus-filled pimples are other common ...
Black hair can come in a variety of textures, just as any hair color. Generally, the East Asian, Central Asian and Native American population has straight hair with a very thick cuticle layer [ 5 ] and South Asians have thick, wavy or curly hair , [ 6 ] while the general hair type seen in black African hair is thick, curly and dense with more ...
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