Yes, a breast lift and fat transfer to the breasts can often be done during the same operation, but the plan has to be conservative and tailored to your skin quality, breast shape, and goals. Fat grafting itself does not usually make scars wider. Scar widening is more related to tension on the incision, skin quality, healing biology, infection, smoking/nicotine, and how much the breast skin is being tightened or stretched. If only a modest amount of fat is placed, it should not significantly stretch the skin or place extra tension on the lift incisions. The concern with doing both together is that a lift tightens and reshapes the breast, while fat transfer adds volume. If too much fat is placed at the same time, it can increase pressure in the tissues and may reduce fat survival or compromise healing. For that reason, many surgeons use fat grafting mainly to soften the upper pole, improve cleavage, or correct small contour deficiencies during a lift. Larger volume goals may be better staged. Your surgeon should examine your tissue thickness, degree of sagging, scar pattern needed, and donor fat availability. A staged approach may be recommended if you want a major size increase, have thin skin, poor scar history, nicotine exposure, or need a more extensive lift.