What Causes a Double Chin and Can You Get Rid of It?

Submental fat is the most common cause — a deposit of fat cells beneath the chin and above the neck. Like all body fat, it is partially genetically determined in its distribution. Some people accumulate fat preferentially in the submental area even at healthy overall body weights, making it resistant to general weight loss. This is why two people with identical BMIs can have very different submental fullness.

Skin laxity becomes a contributor with age. As collagen production declines and skin loses elasticity, the platysma muscle and overlying skin below the jaw begin to sag, creating a double chin even where submental fat has not increased. This type worsens progressively through the 40s and 50s and cannot be addressed through weight loss alone.

Posture is an underappreciated cause that affects people of all ages. Forward head posture — where the head juts forward of the shoulders — compresses the submental tissue, pushing it downward and forward and making even modest amounts of submental fat appear as a pronounced double chin. Phone use, desk work, and weak neck musculature all contribute. Correcting posture alone can produce visible jawline improvement without any change in weight.

For most people with a body fat-related double chin, yes — weight loss will reduce submental fullness. Facial fat tends to respond relatively quickly to caloric deficit, and the submental area often shows visible change with 10–15 pounds of total body weight loss. However, the degree of improvement varies based on how much of the double chin is fat versus loose skin.

The complication is that significant weight loss can worsen the appearance in people with skin laxity — as fat decreases, the overlying loose skin becomes more visible rather than less. In these cases, skin tightening interventions (radiofrequency treatments, ultrasound therapy, or clinical procedures) are needed alongside fat reduction.

Spot reduction — reducing fat from one specific area through targeted exercise — is not physiologically possible. Facial exercises and neck exercises can improve muscle tone, which may add definition, but they cannot selectively burn submental fat. Fat loss is systemic, not targeted.

For submental fat in people at or near their goal weight, injectable deoxycholic acid (brand name Kybella in the US) is FDA-approved specifically for submental fat reduction. It destroys fat cell membranes, with results appearing over several months after 2–4 treatment sessions. Multiple clinical trials demonstrate its efficacy and safety. CoolSculpting (cryolipolysis) applied to the submental area also has clinical evidence for modest fat reduction.

Radiofrequency and high-intensity focused ultrasound (HIFU) devices target skin laxity by stimulating collagen production deep in the dermis. These are better suited to the skin laxity component than the fat component. The evidence base for these is moderate — improvements are real but more modest than surgical options.

Submentoplasty (surgical removal of submental fat) and neck lifts remain the most reliable option for significant or persistent double chins — particularly the combination of fat and skin laxity. These are clinical decisions requiring consultation with a board-certified plastic surgeon.

Neck posture correction through specific exercises — chin tucks, neck stretches, resistance band work — can visibly reduce the appearance of a double chin within weeks. The goal is to strengthen the deep cervical flexors and retract the head to a neutral position. Consistent posture correction also prevents further worsening and improves overall facial appearance from a profile view.

Hairstyle and neckline choices can visually minimise a double chin. V-necklines draw the eye downward past the chin. Longer hairstyles that frame the face create visual elongation. Avoiding high necklines, crew necks, or horizontal stripes across the collar area reduces the visual emphasis on the jaw-neck transition.