Dermatillomania is thought affect between roughly 1-5 percent of the population. However, the actual figures may be higher due to the fact that many if not most sufferers do not seek medical treatment and it is often misdiagnosed as another mental disorder.
For some, the onset happens before age 10. For others, it starts in the teens with acne. Others may not see onset until the ages of 30-45. Dermatillomania can onset at any age. Dermatillomania is more common in females than in males, but does affect both.
Dermatillomania is more prevalent in people who have family members with the disorder, people who have certain other mental health disorders like depression and OCD, and people with certain other disorders such as Prader–Willi syndrome and Smith–Magenis syndrome.