It’s normal, on occasion, to go back and double-check that the iron is unplugged or your car is locked. But if you suffer from obsessive-compulsive disorder (OCD), obsessive thoughts and compulsive behaviors become so excessive they interfere with your daily life. No matter what you do, you can’t seem to shake them. But help is available. With treatment and self-help strategies, you can break free of the unwanted thoughts and irrational urges and take back control of your life.