What Causes Double Crowns in Hair?

By Staff WriterLast Updated Apr 1, 2020 10:10:14 AM ET

Hair crowns, or hair whorls, are patterns of hair growth that can be seen as a "spiral" on the back of the head. Double hair crowns appear as two spirals. In a 1975 genetic study by Wunderlich and Hereema, 1.5 percent of the population was estimated to have double crowns, according to John H. McDonald from the University of Delaware.

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