Uncombable hair syndrome (also known as Pili trianguli et canaliculi, Spun-glass hair, and Cheveux incoiffables) is a rare structural anomaly of the hair with a variable degree of effect. It was discovered in the 1970s. It becomes apparent from as little as 3 months to up to 12 years.
The hair is normal in quantity and is usually silvery-blond or straw-colored. It is disorderly, it stands out from the scalp, and cannot be combed flat. The underlying structural anomaly is longitudinal grooving of the hair shaft, which appears triangular in cross section. To be noticeable, 50 % of hairs must be affected by the structural abnormality. Improvement often occurs in later childhood.
The Daily Omnivore 
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