Abnormal hair pattern Abnormal number of hair whorls 2010-07-05T11:12:26Z Abnormal number of hair whorls More than two clockwise hair whorls. Extra hair whorl Extra hair swirls Most individuals have one clockwise hair whorl at a single point on the scalp lateral to the midline but close to the vertex of the skull. Five percent of the population has two whorls. A double hair whorl is sometimes referred to as a double crown. In 10%, whorl direction is counter-clockwise. Double crown (hair whorls) Supernumary hair whorl HP:0010813 UMLS:C4023695 Abnormal number of hair swirls Supernumary hair swirls