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From Wikipedia: (https://en.wikipedia.org/wiki/Trichotillomania#History)
Hair pulling was first mentioned by Aristotle in the fourth century B.C., was first described in modern literature in 1885, and the term trichotillomania was coined by the French dermatologist François Henri Hallopeau in 1889.
In 1987, trichotillomania was recognized in the Diagnostic and Statistical Manual of the American Psychiatric Association, third edition-revised (DSM-III-R).