Round, sensitive lump on face 6 months after limited incision facelift. Could this be fat necrosis?

An examination is needed to be certain, especially since you did not provide a photo. I would suggest going back to your surgeon and discussing your concerns.

Thank you for your question. It is hard to know what that lump could be without seeing you in person. I recommend making an appointment with your surgeon to have an in-person examination; they should be able to determine what it is most likely to be and therefore what can be done, if anything. Best of luck!