OCD (Obsessive-Compulsive Disorder) from PTSD
People with OCD People with OCD need to repeat ideas or actions, which don't make sense, but the need to do it is very strong. The most common example is washing your hands a hundred times a day.
A mild example would be the one we used to do as kids: "Step on a crack, break somebody's back." We grew out of it. Another mild one is checking a zillion times whether you turned off the stove. If you find this sort of thing continuing for too long, it's best to see a doctor or therapist about it.
Severe OCD Severe OCD can take over your life and become disabling.