Double Chin & Under-Chin Fullness
Slim and Tighten in Sunnyvale, California
The fullness under the chin is often genetic, frequently immune to diet and exercise, and impossible to hide from a side-angle photo. It is also usually two different problems, extra fat and loose skin, and we treat each with its own tool.
What’s going on?
What reads as one double chin is usually some ratio of two things. The first is a localized pocket of fat that sits under the chin no matter what the scale says; those fat cells are simply last in line, and no diet chooses where the loss comes from. The second is skin that has loosened as collagen thinned, blurring the line between jaw and neck.
The ratio matters because the tools split the same way: injections that dissolve the fat itself, and radiofrequency energy that tightens the loose skin above it. Many profiles need a little of both, which is exactly what the consultation sorts out.
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Dissolve the fat, tighten the skin
Start with chin fat versus loose skin to understand the different treatment paths. If the width sits at the jaw angle rather than under the chin, read whether masseter Botox slims the jaw.
Fat reduction injections treat the fullness itself. Deoxycholic acid, a naturally occurring molecule that breaks down dietary fat, is injected precisely into the under-chin area, where it gradually dissolves localized fat cells over a series of 20 to 30 minute sessions for a slimmer, more contoured profile.
XERF Lifting treats the skin above. Its radiofrequency energy prompts the loose skin on the neck and under the chin to contract and rebuild its own collagen, redefining the jawline with no needles, no numbing, and no downtime.
The Treatments We Reach For
Listed in the order we most often recommend them. Your consultation decides which fits your skin, your goals, and your downtime.
Fat Reduction Injections
Deoxycholic acid injections that gradually dissolve the under-chin fat itself.
XERF Lifting
Radiofrequency tightening for the loose skin blurring the jawline, with no needles and no downtime.
Frequently Asked Questions
What is deoxycholic acid?
A molecule your body already makes to break down and absorb dietary fat. Injected precisely, it does the same job on localized fat cells under the chin, reducing the fat layer gradually and naturally.
How many injection sessions will I need?
Results build progressively over a series rather than in one visit. How many sessions your profile needs depends on how much fullness you are starting with, which Marie assesses at your consultation.
Fat or loose skin: how do I know which I have?
You usually cannot tell from the mirror, and most profiles carry some of each. At your consultation Marie evaluates what is fat and what is laxity, then sequences the right combination for your anatomy.
Is there downtime?
XERF has none; most clients head straight back to their day. Downtime after fat reduction injections varies from person to person, and Marie will tell you what to expect for your treatment plan.
Can XERF alone fix my double chin?
If the fullness is mostly loose skin rather than fat, it can make a real difference on its own: XERF is designed for exactly that laxity under the chin and along the neck. If a fat pocket is part of the picture, injections address what radiofrequency cannot.
Where to Next?
Keep reading
Is XERF a Facelift?
What a non-surgical facelift really means, and who mild to moderate laxity makes it right for.
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How Long Until XERF Results Show?
Some firming is immediate; the real lift builds over 2 to 6 months. Why collagen sets the schedule.
Read the articleRelated concern
Sagging Skin & Loose Neck
Lift and tighten without surgery
Start from the concernMedically reviewed by Marie Jin, ACNP-BC, board certified acute care nurse practitioner and founder of Marie Jé Aesthetics. This page is for education and is not a substitute for a personalized medical consultation.