Brittle hair Fragile hair UMLS:C1851868 Fractured hair Brittle is used to describe hair which is very short because of an abnormality is in the structure of the shaft. Microscopically the ends appear fractured. Affected patients may report bits of hair on the collar or pillow. Brittle hair can be distinguished from hypotrichosis due to slow or deficient growth (e.g., due to hypotrichosis simplex) and hypotrichosis due to the hair being fine and soft where the hair just wears out too quickly (e.g., due to ectodermal dysplasia). UMLS:C0263490 Easily breakable hair Fragile, easily breakable hair, i.e., with reduced tensile strength. Brittle hair Reduced tensile strength of hair UMLS:C1970705 UMLS:C4072837 HP:0002299 SNOMEDCT_US:25159003 Abnormality of hair texture