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    GlossaryUncombable Hair Syndrome (Pili Trianguli et Canaliculi)

    rare genetic condition causing frizzy, unmanageable hair with unique shaft structure

    Uncombable Hair Syndrome (UHS), also known as Pili Trianguli et Canaliculi or Spun Glass Hair, is a rare genetic condition characterized by dry, frizzy hair that stands out from the scalp and cannot be combed flat. The hair shafts are uniquely structured with a triangular or heart-shaped cross-section and a longitudinal groove, making them resistant to being styled or managed.

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