Should I tell my mom how I really hurt my knee?

All through middle school and high school I suffered from depression and anxiety. Something that triggered my anxiety was school so I use to do anything to get out of school...I hated lying to my parents so I would physically make myself sick or hurt.

One time I hit my knee about 30 times with a wooden figure in my room until it swelled. I did that frequently to get out of school. Sometimes id rub a brush on it till it got bumpy and swollen or id hit it so hard that I couldnt walk and I actually did develop bursitis and my knees bother me on occasion to this day. Now back then I convinced myself that these things happened naturally and id block out me doing them to myself.

But now that im better after 6 years on medication...I feel guilty about these things. I mean sometimes I feel like I should leave it in the past but other times so I dont make ny mom feel bad but other times I feel I should tell her because she trusts me so much and I feel like I lied to her all those years (even if I was not in a normal state of mind)

She knows I faked things sometimes to get out of school...she knows it caused ne anxiety considering I tried to jump out of a car on the way to school one day...but idk if she could handle knowing her child smashed her knees until she developed a real problem that will now effect me for the rest of my life.