Sudden whitening of the hair.
D005060:Europe; D006197:Hair; D049669:History, 16th Century; D049670:History, 17th Century; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D049691:History, Medieval; D006801:Humans; D010859:Pigmentation Disorders / Q000266:history*; D013997:Time Factors; D014481:United States