Diabetes affects your body in ways that increase the risks for infection and poor healing. Lipo essentially creates a large wound beneath the skin of the treatment site which needs to heal. If it doesn't heal or becomes infected, you will have a major potentially disfiguring problem. For weight...
Arms can develop a large degree of swelling if compression garments are not properly worn or not tight enough. Double check with your surgeon to see if you have a hematoma. If they were smaller after lipo, it's probably fluid. Fat doesn't magically grow back. Go for massages as well.
Thank you for your question. This is one of the difficult areas for liposuction and minor contour irregularities are not uncommon. It is only 11 weeks post op. I would recommend to wait 6 months and reevaluate and if needed revision can be performed along with fat grafting if needed. Good luck