Is OCD Caused by Trauma?

OCD is not usually caused by a single event like trauma, but trauma can interact with underlying vulnerabilities and sometimes trigger or worsen symptoms. Many people with OCD have no clear traumatic event; instead, a mixture of genetic, brain-based, and psychological factors is involved. However, for some individuals, a traumatic experience, major loss, bullying, medical illness, or intense stress seems to precede the onset or escalation of obsessions and compulsions. Trauma can also complicate OCD by adding symptoms of post-traumatic stress, such as flashbacks or hypervigilance, which may blend with OCD fears. Effective treatment often needs to address both OCD and any trauma-related difficulties together.