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Double chin or submental fullness can appear because of genetics, weight gain, skin laxity, posture, and age-related tissue change. Many patients notice that this area remains resistant even when overall weight is controlled.
Modern treatment focuses on reducing localized fat and deciding whether the area also needs skin tightening. Good planning matters because fullness caused mainly by fat is treated differently from fullness caused mainly by laxity.
Kybella is the best-known injectable option for dissolving submental fat and is based on deoxycholic acid. Lipolysis injections are used with a similar goal in selected protocols, while HIFU or other tightening methods may be added when laxity is part of the picture.
The right method depends on the amount of fat, skin quality, jaw structure, and whether the patient needs fat reduction alone or a combined contour strategy.
Treatment usually involves multiple small injections placed across the submental area after assessment and marking. Temporary swelling is common and should be expected rather than treated as a surprise.
Most patients need more than one session, and the visible result develops gradually over several weeks as the inflammatory phase settles and the area refines.
Dr. Gemici: The best submental result comes from matching the treatment to the anatomy. If fullness is mostly fat, we dissolve fat. If laxity dominates, tightening must be part of the plan.
When fat cells are successfully destroyed, the reduction can be long-lasting. However, remaining cells can still enlarge if body weight changes significantly, so maintenance of general lifestyle still matters.
Patients with marked skin laxity, major structural issues, or prior surgery in the area may need a different or more advanced plan. That is why direct examination is important before treatment choice.
Yes. Swelling is one of the most expected short-term effects and can be noticeable for several days.
Destroyed fat cells do not return, but remaining tissue can still enlarge if weight increases significantly.
Not always. If skin laxity is a major part of the problem, tightening treatment may need to be added.

Trusted & Professional
Dr. Hamza Gemici is a medical aesthetic physician based in Ataşehir, Istanbul. His practice focuses on natural anti-aging and subtle facial harmonization using botulinum toxin, dermal fillers, periocular rejuvenation and skin quality procedures. All treatments are performed with FDA-approved products under physician-guided protocols.