Is it normal i hurt and abuse my bottom lip?

I've looked all around on the internet for anything like this and I can't find anything beyond oral fixation or..uh.. psychosexual development?
ever since i was a very small child I would occasionally hurt my lip in an obsessive way. It's not all the time or anything, but if i somehow end up touching or focusing on my bottom lip i'll do things such as pull very hard on my bottom lip to elicit pain, dry my whole lip out with a towel or sleeve (until the whole inside of my lip and bottom gums were without saliva or slimy, just dry flesh) bite it, and pull some more. I'll pull for a very long time sometimes. i'll do all these behaviors repeatedly to my lip and it will increase in intensity until I realize what i'm doing and stop myself. my lip is noticeably red, irritated and enlarged for a while afterward. ( 30-60 mins) my lip is actually also much larger than my top one even when I dont do this, and it kinda makes me think i've made it that way. It does pleasure me, but not so much in a sexual way as in a feeling like its good and I have to do it.