You took the words right out of my mouth, Trumpcard.
Obsessive-Compulsive Disorder affects 1:50 people today, with varying degrees of severity.
Luckily, treatment can help most people with OCD. Although OCD is usually completely curable only in some individuals, most people achieve meaningful and long-term symptom relief with comprehensive treatment.
http://www.ocfoundation.org/ocf1010a.htm
Of course, information is key here, but if I were worried about abnormal behavior in my child, I'd start asking questions and find out what the hell was the problem.