The area you circled may not be simple "fat." In that cheek region, fullness can come from the malar fat pad, buccal fat, thicker skin/subcutaneous fat, the masseter muscle, the parotid gland area, or normal inherited facial structure. The fact that your brother has a similar shape makes a genetic facial contour very possible. From the photos, the fullness appears to be in the lateral cheek/midface area, not just the lower cheek. That distinction matters because buccal fat removal only treats deeper lower-cheek fullness and can make some faces look hollow or older if used for the wrong problem. Facial liposuction is also limited in this area and can create irregularities if the fullness is not in a safe, superficial fat layer. The best first step is an in-person exam with a board-certified plastic surgeon, facial plastic surgeon, or dermatologist who does facial contouring. They can determine whether the fullness is fat, muscle, gland, swelling, or bone structure. If there is one-sided enlargement, pain, firmness, rapid growth, dry mouth, or swelling that changes with eating, you should also be evaluated medically to rule out a salivary gland issue. Treatment depends on the cause. Options may include doing nothing, weight stabilization, very conservative facial liposuction in selected cases, buccal fat removal only if the lower cheek is the issue, masseter Botox if jaw muscle bulk is contributing, or filler/contouring in surrounding areas to improve facial balance. The wrong treatment can make the cheek look uneven or hollow, so diagnosis matters more than choosing a procedure name.