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Poliosis. 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.
Changes in hair colour typically occur naturally as people age, eventually turning the hair grey and then white. This normally begins in the early to mid-twenties in men and late twenties in women. More than 60 percent of Americans have some grey hair by age 40. The age at which greying begins seems almost entirely due to genetics.
Premature greying of hair (PGH), also known as canities, is the process of greying of hair occurring at an unusually early age. It can have negative effects on self-confidence, self-esteem, and social acceptance of the affected individual. Hair is said to have greyed prematurely if it occurs before the age of 20 years in Europeans, before 25 ...
Human skin color. Human skin color ranges from the darkest brown to the lightest hues. Differences in skin color among individuals is caused by variation in pigmentation, which is the result of genetics (inherited from one's biological parents), exposure to the sun, disorders, or some combination thereof.
Waardenburg syndrome is a group of rare genetic conditions characterised by at least some degree of congenital hearing loss and pigmentation deficiencies, which can include bright blue eyes (or one blue eye and one brown eye), a white forelock or patches of light skin. These basic features constitute type 2 of the condition; in type 1, there is ...
Alopecia areata, also known as spot baldness, is a condition in which hair is lost from some or all areas of the body. [12][1] It often results in a few bald spots on the scalp, each about the size of a coin. [7] Psychological stress and illness are possible factors in bringing on alopecia areata in individuals at risk, but in most cases there ...
e. African-American hair or Black hair refers to hair types, textures, and styles that are linked to African-American culture, often drawing inspiration from African hair culture. It plays a major role in the identity and politics of Black culture in the United States and across the diaspora. [1] African-American hair often has a kinky hairy ...
Keratosis pilaris. Keratosis pilaris (KP; also follicular keratosis, lichen pilaris, or colloquially chicken skin[1]) is a common, autosomal - dominant, genetic condition of the skin's hair follicles characterized by the appearance of possibly itchy, small, gooseflesh -like bumps, with varying degrees of reddening or inflammation. [2]