ligament

Looking to have this surgery on my ankle. Anyone out there w tips

Hi! I was wondering if any of you wearing a knee brace could help me? My brace doesn’t fit well since a little while and I’m wondering what the problem could be? As you can see on the pic, there is a part that dig into my skin and hurts me. Is my brace too small? I’ve gained a bit of weight in the last months. I’ve tried to adjust the straps but it doesn’t seem to help. What can I do? What is the problem? Thanks a lot!