Cause of OCD
Some treatments for obsessive compulsive disorder are aimed at correcting a potential cause of OCD, lower levels of a brain signaling protein. Other treatments center on recognizing and coping with unwanted behaviors.
Yale Daily News
A mutation in a gene for a protein that transports a brain signaling molecule, serotonin, might be a cause of OCD. There's likely more than one gene involved in this condition, though. Learn more here.