Large seroma on hip due to fall on steps, drained, had a steroid injection. How to get rid of it ?

I fell on uncarpeted steps onto my hip 4 wks ago. I now have a large seroma on this hip. Ortho drained it last week and got 360cc s out, but could not get all of it. I went back again today and he extracted about that same amount. In addition, he injected the sight today with a steroid . The lab results were negative for infection. The surgeon wants me to heal on my own if possible and wants me to keep getting extractions and wear a Spanxs for another 2 months. I am really wanting to get rid of this seroma and begin to wear normal clothes again.