What Exactly Is Obsessive-Compulsive Disorder (OCD)?

Obsessive-compulsive disorder is a mental illness. It's made up of two parts: obsessions and compulsions. People may experience obsessions, compulsions, or both, and they cause a lot of distress. Obsessions are unwanted and repetitive thoughts, urges, or images that don't go away.

Obsessive-compulsive disorder usually includes both obsessions and compulsions. But it's also possible to have only obsession symptoms or only compulsion symptoms. You may or may not realize that your obsessions and compulsions are excessive or unreasonable, but they take up a great deal of time and interfere with your daily routine and social or work functioning.