In previous versions of the DSM dermatillomania was classified under obsessive compulsive disorder. It was and still is a very misdiagnosed disorder. The most recent version of the DSM now lists dermatillomania as its own disorder with its own diagnostic criteria: excoriation disorder.
More recently, researchers are finally trying to shed light on excoriation disorder and its causes, most effective treatments, and who it affects.
The first known mention of excoriation disorder in the print can be found in 1898 by the French dermatologist Louis-Anne-Jean Brocq, describing an adolescent female patient who had uncontrolled picking of acne.