Swollen lump of fluid after accident.

About 3 weeks ago I had an accident by tipping an ATV on its side. Upon tipping it I caused a lot of damage to my ankle area that is receiving ongoing medical attention however I also had a case of road rash on the side of my hip, around the fatty part of my upper leg/butt however the wound is completely gone but there is still a very large lump that is protruding and it doesn't seem to be getting any better. There was quite a significant bruise on it before however that has also subsided. There seems to be fluid of some kind in this lump and I'm just wondering if it's normal and what I can do to get rid of it? I've tried to drain it but only a small about of blood comes out at a time and it is very tender when pressing on it.