This document discusses obsessive-compulsive disorder (OCD) and the experiences of those who suffer from it. OCD involves obsessive thoughts and fears that lead to compulsive behaviors. Common types of OCD include checking, contamination, hoarding, and intrusive thoughts related to relationships, sex, religion, and violence. The document shares stories of individuals struggling with checking and contamination OCD and how their compulsions control many aspects of daily life. It emphasizes that OCD can be treated through therapies like cognitive behavioral therapy and medication, and untreated OCD will likely worsen over time.