Bald Patches (IMAGE) NIH/National Institute of Mental Health Caption Some humans with trichotillomania, or compulsive hair pulling, an OCD spectrum disorder, also develop bald patches on their heads. Credit NIH/National Library of Medicine Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.