It is very unusual for a lipoma to cause back pain. Lipomas are usually superficial and soft collections of fat that reside in the skin and subcutaneous tissue. If the lipoma is large or suppressing on nearby structures, it is possible that it may cause pain. Your best bet is to be evaluated by...
For most surgeons, the closure of the wound is a nuisance and left for an intern to do. For a plastic surgeon, it is a major part of the procedure. So I would clearly choose a plastic surgeon to remove a lipoma and in my practice it is generally performed with only local anesthesia...
I would recommend you find a board certified plastic surgeon by the American Board of Plastic Sugery, who has an extensive experience in Lipoma Removal.Best Regards,Dr. Gartner