I had a small one in groin area two years ago. It was right where the elastic part of my underwear were on inner thigh/groin area. I used heat compress and it opened up and healed (I thought) pretty quickly. Now here I am two years later and in that exact spot a painful scar looking thing has appeared. I tried heat, but it never really opened. I tried tea tree oil, vicks, peroxide- nothing. The weirdest thing is there’s no bump. It’s the opposite. It feels like there’s a small hole underneath some really thin skin that is red and very tender. Any idea what will help this?