I went for months without Self injury/self harm (im not clear on the difference if any). I thought about it sure but didn't give in. Then i thought about it a little less and it was going well then BAM! The urges got intense again

i did it once about 3 weeks ago but not that bad and tried not to make a deal about it. Then i did it again yesturday more this time like i use to.
I hate knowing my arm is all messed up and i have to be careful about my sleeve length for while. I feel like i'm going to let my T down, do you think i have to tell him everytime i do it? -ok i know anyone who responds will say i should tell him.