People with disorders experience thoughts and urges that are intrusive and unwanted and/or the need to engage in repetitive behaviors or mental acts.

obsessive-compulsive

Explanation:

Currently, the main cause of obsessive-compulsive disorder hasn't been known, but most cases of obsessive-compulsive disorder are accompanied by extreme phobia toward a certain things. (Such as germs)

People who have extreme phobia of germs can develop an irrational fears that their hands are at risk of germs contamination from touching the objects around them. This cause them to repetitively washing their hands within short period of time.

answer; /// the above statement is (true);