30% TCA done on knees 2 days post. Is this bruising normal? (Photo)

So normally, I’m used to doing 30% of TCA. At home like in general, my feet or my arms, but The last time I had it done was two years ago I did the peel follow all steps kept it on for 5 mins & it stinged and burned but after 18hrs it is all normal no pain or stinging but now it looks like a bruise It is of blackish-brownish- purplish red color and im scared will it peel is it normal.. will attach pic below too… plz help me out