Getting rid of jaw fat, often called submental fullness or a double chin, requires a combination of approaches because you can’t target fat loss to one specific area. The strategy that works best depends on what’s causing the fullness in the first place: excess body fat, genetics, aging skin, or even your daily posture habits. Here’s what actually works, what doesn’t, and how to choose the right approach.
Why Fat Accumulates Under the Jaw
The area under your chin stores fat just like your belly, hips, or thighs. For some people, genetics are the primary driver. If your parents or grandparents had a double chin, you’re more likely to develop one regardless of your body type. Genetic fat distribution means even thin people can carry fullness under the jaw, especially if they also inherited a less prominent chin or jawbone structure.
Aging compounds the problem. Collagen production slows over time, skin loses its elasticity, and the muscles under the chin weaken. The result is looser, sagging skin and a softer-looking jawline. Some people gain fat in the area as they age, while others simply notice the skin no longer holds tight.
Two other factors are surprisingly influential. Poor posture, particularly the forward-head position from staring at phones and laptops (“tech neck”), weakens neck and jawline muscles and pushes skin and fat forward into the submental area. And high sodium intake causes the body to hold extra water to dilute the salt in your bloodstream, creating puffiness and swelling that’s especially visible in the face. Reducing salt and fixing your posture won’t eliminate fat, but they can meaningfully change how your jawline looks.
Weight Loss: The First Step for Most People
If you’re carrying extra body fat, losing weight is the most effective starting point. Reducing overall body fat naturally slims the face, including the area under your jaw. There’s no way to spot-reduce fat from a single area of the body. No food, supplement, or exercise will selectively burn jaw fat while leaving the rest of your body unchanged. What works is a sustained calorie deficit through a balanced diet and regular exercise.
That said, the face is one of the areas where fat loss tends to become visible relatively quickly, which can be motivating. Even a moderate reduction in body fat percentage can sharpen the jawline noticeably. For people whose jaw fullness is primarily from excess weight, this alone may be enough.
What Facial Exercises Can and Can’t Do
Jaw and neck exercises are one of the most-searched remedies, and they do have some value, just not in the way most people expect. Facial exercises don’t burn fat under your chin. What they can do is build the muscles underneath, which improves facial tone, firmness, and lift. A systematic review of facial exercise studies found that 20 weeks of consistent facial exercise therapy increased muscle thickness and cross-sectional area, improved skin elasticity, and enhanced fullness in the mid and lower face.
Think of it this way: stronger, thicker muscles beneath the skin create a firmer foundation, which can make a soft jawline look more defined even if the fat layer hasn’t changed much. Exercises like chin tucks, neck stretches, and resistance-based jaw movements are worth adding to your routine, but expect subtle, gradual improvements over months rather than dramatic fat loss.
Fixing Posture and Reducing Bloat
These two changes cost nothing and can make a visible difference within days to weeks. For posture, the goal is to counteract forward-head positioning. Hold your phone at eye level instead of looking down. Set your computer monitor so the screen sits at eye height. Throughout the day, gently extend your head backward, tilt it side to side, and stretch your neck. Strengthening the muscles that hold your head in proper alignment pulls the skin and tissue under your chin taut rather than letting it bunch forward.
For water retention, cutting back on processed foods, restaurant meals, and added salt reduces the sodium load that triggers facial puffiness. When your body senses excess sodium, it holds onto water to dilute it, and that bloating concentrates in the face, around the eyes, and under the jaw. Drinking more water, counterintuitively, helps your body release retained fluid rather than hoard it. You may notice a slimmer-looking jawline within a few days of lowering your sodium intake.
Non-Surgical Treatments
When lifestyle changes aren’t enough, two non-surgical options are widely available for targeting submental fat directly.
Injectable Fat Reduction
Kybella is an injectable treatment that uses a synthetic version of a naturally occurring molecule to destroy fat cells under the chin. In clinical trials, 68% of patients achieved at least a one-grade improvement in submental fullness, compared to about 21% of those receiving a placebo. Most people need multiple sessions: 59% of trial participants received six treatments, spaced at least one month apart. Each session involves multiple small injections under the chin. Costs vary widely by location, ranging from roughly $600 per session at some clinics to $1,800 or more per session in major cities.
The destroyed fat cells don’t regenerate, so results are considered permanent as long as your weight stays stable. Expect swelling, bruising, and numbness in the treatment area for several days after each session.
Fat Freezing
CoolSculpting (using a small applicator designed for the chin area) works by cooling fat cells to the point of destruction. A single treatment typically eliminates 20 to 25 percent of fat cells in the targeted area. Some people need two or three sessions for their desired result. Like Kybella, the fat cells that are destroyed don’t come back. Results develop gradually over several weeks as the body processes and removes the dead cells.
Surgical Options
For more significant or stubborn submental fat, surgical approaches deliver the most dramatic results.
Chin and Neck Liposuction
This is the most common surgical option for people whose main issue is excess fat rather than loose skin. The best candidates are typically in their 20s through early 50s, because younger skin has enough elasticity to contract smoothly after fat is removed. Recovery follows a predictable timeline: swelling drops by about 50% within the first week, 90% of swelling resolves by month three, and final results are fully visible by month six. Most people return to work within a week, though you’ll wear a compression garment under the chin for several weeks.
Neck Lift
If your concern is primarily sagging, loose skin rather than fat, or if you’re older with reduced skin elasticity, a neck lift addresses both excess skin and underlying muscle laxity. This is a more involved procedure with a longer recovery, but it can reshape the entire jawline and neck contour in ways that liposuction alone cannot. Total costs for chin and neck cosmetic surgery range from $1,200 to $12,000, depending on the procedure, the surgeon, and your geographic area.
Choosing the Right Approach
Your starting point matters. If you have excess body fat generally, weight loss paired with posture correction and sodium reduction is the logical first step, and it may be all you need. If you’re already at a healthy weight but carry fullness under the jaw due to genetics, non-surgical treatments like Kybella or CoolSculpting can reduce that stubborn pocket without downtime from surgery. If you have significant fat deposits or loose, sagging skin, surgical options offer the most definitive results.
Age plays a role in the decision too. Younger skin bounces back well after fat removal, making liposuction a straightforward choice. Older skin that has lost elasticity may need a lift to avoid looking loose after fat is reduced. Many people combine approaches: losing weight first, adding facial exercises and posture work, then pursuing a targeted treatment for whatever fullness remains.