Getting the loose skin under the chin tightened up is best addressed directly by a platysmaplasty under the chin incision.
Hello and thank you for your question. Based on your photographs and neck laxity, you may benefit from a mini facelift with a neck lift. If good technique is used, this can be done with minimal scarring and can result in a natural look, not over-done look, with rejuvenation of your face and neck. You will likely need more than incisions only behind your ears. Make sure you specifically look at before and after pictures of real patients who have had this surgery performed by your surgeon and evaluate their results. Best wishes and good luck. Richard G. Reish, M.D. FACS Harvard-trained plastic surgeon