Woolly hair Woolly scalp hair UMLS:C4015203 Wooly scalp hair UMLS:C4280292 UMLS:C4280293 The presence of wooly hair on the scalp. The term wooly hair refers to an abnormal variant of hair that is fine, with tightly coiled curls, and often hypopigmented. Optical microscopy may reveal the presence of tight spirals and a clear diameter reduction as compared with normal hair. Electron microscopy may show flat, oval hair shafts with reduced transversal diameter. Kinky scalp hair texture Nappy scalp hair texture Afro-textured scalp hair UMLS:C4280291