Have you ever observed someone so afraid of germs that they must wash their hands excessively? Seen someone step over cracks because they think something bad will happen to them? Watch someone repeatedly check to see if they left the lights on? These are all examples of people suffering from Obsessive-Compulsive Disorder (OCD), a highly intrusive problem that affects over two million people in the United States alone. Click here to read more about OCD and what can be done to treat this invasive disorder.