Q.) how it started after a surgery.

A.) OCD is used by the brain sometimes as a coping mechanism. Coping mechanisms are needed by the brain to deal with stressful situations. That is why sometimes the body goes into shock. It's just your brain's way of dealing with a highly stressful situation. The best thing that you can do to help yourself with OCD is to reduce the stress that is in your life so that you are more able to deal with facing OCD and changing it. There are many different kinds of coping mechanisms. Some people smoke when they are stressed, some drink. I did both! A coping mechanism is something your brain does that it believes calms you and that it believes will reduce stress. That is why so many people think that cigarettes calm them when it's really a stimulant. Why do so many smokers need to take a lot of cigarette breaks, because their body relies on this to calm itself down instead of more healthy, less expensive habits. So...

Our coping mechanisms become habits. We can choose what habits we develop and which ones we starve.