How is obsessive-compulsive disorder diagnosed?

Answer:
While scientists seem to agree that OCD is related to a disruption in serotonin levels, there is no blood test for the condition. Instead, doctors diagnose OCD after evaluating a person's symptoms and history.
First answer by Gale Ency. of Alt Med. Last edit by Gale Ency. of Alt Med. Contributor trust: 16 [recommend contributor recommended]. Question popularity: 2 [recommend question].