Pls someone tell me what that is

I can't stop touching the corner of things, like every time I loose focus on something I HAVE to touche the corner of my desk and my shelves, and every time I walk out of a room I touch the sharp part of the door handle.

Also if I use my right hand too much I just feel like I need to use the left one as much as I used the right one, that was when I was 10-12 and now that feeling is weaker but still.

The corner thing is so annoying bc everytday every time I have this feeling I gotta do it. 

PLS SOMEONE TELL ME WHAT THAT IS AND IF THERE'S A WAY I CAN STOP DOING IT !!!