Woolly hair UMLS:C4072835 UMLS:C4072836 UMLS:C0343073 Nappy hair texture UMLS:C4073292 Kinky hair texture Wooly hair Afro-textured hair See figures in PMID:20464096. MEDDRA:10048017 HP:0002224 SNOMEDCT_US:52564001 Kinked hair 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. Abnormality of hair texture