What is obsessive-compulsive disorder? The reason?

I think in short, it is to keep doing something in order to realize your inner desires and gain a sense of satisfaction. However, these things may seem childish to others. , or maybe as you grow up, these things will become your habit. If you don’t do them, you will feel extremely uncomfortable or uneasy. As you grow up, it will bring you a lot of things. Distress makes you realize that you are different from the people around you. However, compulsion is actually very normal. Many successful people have compulsion, such as forcing themselves to complete their work at night, but they can clearly realize that , Force is their only butcher's knife to success

As for the reason, it's really hard to say, but I think it seems to be a relatively large desire, or a kind of self-esteem towards one's existing environment. A kind of not being quiet, being unable to quietly accept some things in one's own existence. Take me for example. I have been timid since I was a child and have been laughed at by others. I feel very painful for this. What should I do? That is to deny myself directly and do something for others. I think it's something to be bold, but I don't feel happy. Over time, I have developed a problem of forcing myself to be bold

The above is what I think. I hope you can get help. It's best. Give me your share