I need suggested treatment for Severe Pain following Giant EpiSacral Lipomata Removal?

Hello, I had 2 large (7 x 7 x 4) and (6 x 7 x 4) Episacral Lipomas removed from my sacrum. The surgeon cut down to the vertibral fascia. I do not think these were traditional lipomas, but fat hernations as they developed following a severe car accident. I subsequently developed a seroma in each pocket and have stabbing/burning pain. I would love to know if there is any treatment for my now chronic pain and/or scar tissue. Any help or treatment recommendations would be greatly appreciated.