I can't control my mouth. What should I do?

If you can't control it, don't control it. Let it be. If a person is particularly talkative and suddenly stops talking, it will be very depressing and will not do you any good.

If you really want to talk, you might as well take a book, read it out loud, and give it to others or children. This will give you a full sense of language, and will also kill boredom and gradually control it.

In short, this is human nature and it is difficult to change. Unless you gradually realize the disadvantages of talking too much, you will learn a lesson and change something. As for what method, there is nothing directly effective.

I hope this explanation can help you and you can do it yourself.