Kybella
An injection that destroys fat cells under the chin. The fat cells it destroys do not come back, and it cannot be undone. The swelling afterward is larger and lasts longer than most people are told.
Key facts
Treats
Fat beneath the chin
Recovery
About a week of visible swelling
Treatment plan
Often 2–4 sessions, one month apart
Typical cost
About $1,000–1,800 per session
What is it?
It is an injectable medicine.
Kybella is deoxycholic acid, given by prescription.
It treats fat under the chin.
It improves moderate to severe submental fullness in adults.
It is not for weight loss.
It does not treat every cause of a double chin.
Other areas are not established.
Unapproved fat-dissolving injections should be avoided.
What it treats
Double Chin
Permanently reduces fat.
Sagging Skin
Can't tighten loose skin.
Cellulite
Not approved or effective there.
Treatment areas
Kybella
Under the chin (submental area).
Kybella
Under the chin (submental area).
Skin tones
Lighter skin
Low risk
Not a pigment-based treatment.
Medium skin
Low risk
Not a pigment-based treatment.
Deeper skin
Low risk
Not a pigment-based treatment.
How it works
Diagram explanation
Placed in under-chin fat: Deoxycholic acid is injected into selected submental fat. Disrupts fat-cell membranes: The medicine damages cells in the treated fat deposit. The body clears damaged cells: Gradual clearance can reduce the localized fat bulge.
Schematic illustration. Technique and response vary. This explains a mechanism and does not specify treatment settings.
Before your treatment
2–4 weeks before
3 to 4 weeks before: Plan the date: Book at least three to four weeks before anything you want to look normal for.
The week before
3 to 5 days before: Bruising: If you can, stop fish oil, vitamin E and anti-inflammatory painkillers, and no alcohol for 24 hours.
Day of treatment
Arrival & prep
The exam: Expect them to look with your head back and neck tensed, judging how much is fat and how much is skin or muscle.
The area is examined and felt, sitting up, to confirm the fullness is fat and not loose skin, a muscle band or a gland.
Treatment
The injections: Small injections go in at each grid point, about a centimeter apart, up to 50 in a session and no more than 10 milliliters.
The injections: The injecting takes about 15 to 20 minutes, and it is one of the more uncomfortable injectables: intense burning for around 5 to 20 minutes, then a deep ache. Ice helps.
Before you leave
Swelling has usually started before you leave, and the area feels hot, tight and tender.
After your treatment
First 24 hours
Days 1 to 5: The most swollen stage, and the chin can look fuller than before treatment.
Weeks 2–4
Weeks 1 to 2: Swelling drops and most people look normal to others, though the area feels firm and odd.
Weeks 3 to 8: Firmness softens, numbness resolves over weeks, and the reduction shows.
Time to results
1–3 months per session
How long results last
Permanent
Risks
Swelling, bruising, pain, numbness and firm lumps under the chin happen to most people. They are expected effects, not complications, and they settle over weeks. The swelling is bigger and longer than people expect, and it is the main reason people regret the timing rather than the treatment.
The uncommon risks matter before you agree, because this cannot be reversed.
An uneven smile
The medicine can irritate a nerve near the jawline that controls the lower lip, so one side of the mouth does not pull down. Uncommon, usually temporary, and recovery can take weeks to months. Report it as soon as you notice.
Trouble swallowing
Usually mild and short-lived, and more likely while the swelling peaks. Report it rather than waiting it out.
Numbness that lasts
Normal for a few weeks under the chin. Still numb after two months should be assessed.
A firm lump that is not settling
Firmness is expected early. A lump still there at six to eight weeks needs looking at.
Hair loss at the treated site
Uncommon, reported mainly in men with beard hair in the area. Say so if you notice thinning.
An uneven result
Raise it at the review appointment, not after the course is finished — the options narrow once treatment stops.
Cost
Typical cost
About $1,000–1,800 per session
Pricing
In the US the price depends on how many vials are used, so a session commonly runs around $1,000 to $1,800, more for a larger area.
Insurance
Insurance does not cover it.
Alternatives
Submental liposuction
Usually one procedure, and it removes more fat more completely and more predictably than a course of injections. The trade is that it is surgery, with anesthesia, a small incision, a compression garment and about a week of real downtime.
Fat Freezing
An applicator chills the fat through the skin, with no needles and less pain, over a similar number of sessions. It has its own uncommon risk of the treated area growing rather than shrinking, which needs surgery to correct.
Skin-tightening devices
Moderate to limited evidence, and a different target. Radiofrequency and ultrasound act on loose skin, not fat, so they answer the problem this treatment cannot. Results are gradual and generally subtle.
Neck lift surgery
The answer when loose skin and muscle bands, rather than fat, are the main issue. It is the most invasive option and also the most complete.
Weight loss, including GLP-1 medicines
For reducing fat overall. It cannot be aimed at one area, so the chin may or may not change, and losing weight quickly can make loose skin under the jaw more noticeable.
Overall weight loss and stable weight
Losing weight reduces fat everywhere, sometimes including under the chin, but you cannot choose the area. Staying at a stable weight is also what protects the result of any fat treatment.
Daily sunscreen on the neck and jaw
Does nothing for fat, but it is the most useful home habit for the skin in this area, and it prevents the dark marks that follow bruising.
Questions
How swollen will I actually be?
More than you expect. Visibly swollen for around a week, sometimes fuller than before, then softer swelling for two to four weeks. Numbness under the chin is common and can outlast it.
Does it hurt?
The injections are quick, but the burning afterward is intense for about 5 to 20 minutes and the area aches for days. Numbing cream, ice and sometimes injected local anesthetic help. Ask what is offered.
Is it permanent?
Yes, for the fat cells destroyed. They do not regrow. The remaining fat cells can still enlarge with weight gain, and skin keeps aging.
How many sessions will I need?
Usually two to four, at least a month apart, decided by looking at what is left once swelling settles. The label allows up to six.
Is it better than liposuction?
Neither is better in general. Liposuction is one procedure with a more complete, predictable result, and it is surgery. This avoids surgery but takes several rounds of swelling and often costs about the same. Which fits depends on the amount of fat and the downtime you can take.
Will it help my double chin if the problem is loose skin?
No. It only removes fat, and taking fat from under loose skin can make the looseness more obvious. The assessment before treatment should sort this out.
