bleeding during bathroom?

hi ladies! so, im going to ask a question, and prepare urself;

Why does my butthole bleed/tear often when I poop?

I tried anal in August, but I noticed lately that whenever I poop, sometimes it’s too hard and rips my butthole lol. I was on a lot of different antibiotics to take care of a tonsil infection throughout September until November, and had constipation/diarrhea throughout that.

Now, I’m noticing that this happens often. I also have eating disorders, anorexia and Bullimia. Could the tearing be due to my abnormal eating patterns?

Please help if anyone’s ever been through this!