Hello, 5 months back I fell off my horse. A large area of bruising appeared and what we thought a hematoma. My physio treated the hematoma with no luck. I went to my Doctor and he said it was actually a seroma. Since then I have been having it drained with a syringe every 2 weeks. It is on the underside of my buttock just at the top of my thigh. It aches when full again as I sit on it. Has it been to long. I can feel knots starting to form but still I lot of fluid. Should I get a 2nd opionion. I am worried that I will be left with this bump. It shows in all my pants and skirts and is uncomfortable.