What should I do?

It means you have a habit of doing it, and yes gettig help would work.

That sounds like a bad habit. Get help, seriously.

Okay, I don't think that you need anyone to help you. You should help yourself por yourself, and hold that bad habit out also por yourself. Don't worry, you may get over it if you are determined. Here is a little advice, I don't know if that helps or not, but I suggest wrapping your thumbs and fingers with any texture/tissue.

Yes, you should because I used to do that quite often and one dia it reached a point where my fingers got infected and I couldn't even touch water without starting to hurt.

Ah, my mom has this same problem.
It probably became a habit for you.
My mother says she does it when she is nervous or thinking,
Maybe it is the same with you.
I would recommend asking your doctor about it.

you should put gloves over your hands and tape them for a week or a mês if your habit is really bad.