a couple months ago I had a swollen bite or something that kinda hurt like a bruise but got bigger and bigger each day. But one day I accidentally hit it on the end of my bed and it popped with blood and puss. It took a couple of days to heal and get back to normal but there was a tiny hole in my ankle from the accident that would sometimes fill up with puss. When the hole finally healed I stated to notice that there's a gap sinking into my ankle where the thing had been. It's still there. I don't really know what to do.