Double Chin: Excess Fat or Sagging Tissue?
A double chin is often associated with weight gain, yet loose tissue under the chin is common in slim people too. Treatment starts by determining whether the main issue is accumulated fat or sagging skin and fascia. We reduce fat when fat is responsible, lift the jawline when tissue has descended, and address both when they coexist.
Why does a double chin form?
Fat accumulates easily beneath the chin, so this area can thicken early with weight gain. With age, skin loses elasticity and support for the lower face weakens. The cheeks and jawline descend, blurring the border of the jaw. A 2023 review of injectable jawline treatments similarly describes skin laxity and soft-tissue descent as causes of jowls and chin ptosis. A head-down posture or a small, recessed chin can make a double chin more noticeable.
How can you tell fat from sagging?
Double chins can be divided into four patterns, each calling for a different main approach.
| Type | Features | Common approaches |
|---|---|---|
| Predominantly fat | A thick, soft fold can be pinched beneath the chin | Cryolipolysis, microwaves |
| Predominantly sagging | Little fat, but loose skin and a poorly defined jawline | Focused ultrasound, radiofrequency, injectable contour lifting |
| Mixed | Both excess fat and a lowered jawline | Fat reduction combined with lifting |
| Skeletal or postural | More noticeable with a small chin or when looking downward | Chin volume support and posture correction |
If the fullness largely disappears when you lift your chin slightly in the mirror, sagging may contribute more. If it remains thick, fat may play a larger role. Most patients have both. This balance is the first thing we assess: lifting alone in a fatty area, or fat reduction alone in a sagging area, often produces less change than expected. It is an easy distinction to miss without experience.
How is fat beneath the chin reduced?
Cryolipolysis is commonly used when fat predominates. A 2025 meta-analysis of eight studies involving 206 participants found average reductions of 2.78 mm in submental fat thickness and 19.57 cm³ in volume; adverse effects were mild and temporary. CoolSculpting changes begin around 3 weeks and continue for up to 6 months, so it is too early to judge the result in the mirror the next day. Microwaves at 2.45 GHz are another option. In a 2025 study, 10 women with submental laxity received two treatments 30 days apart. The mean laxity grade fell from 3.6 to 2.3 at 12 weeks, with no adverse events.
How is a sagging jawline lifted?
Sagging calls for treatment of the deeper supporting layers. A 2019 expert consensus on microfocused ultrasound with visualization recommended using imaging to select depth and line count and treating at adequate density. When the jawline is blurred and the lateral cheeks are hollow, injectable contour lifting with collagen stimulators such as CaHA or PLLA is another option. Outline Contour Lifting does not dissolve fat, so we recommend it more for loss of jawline definition than for thick submental fat.
Is one treatment enough?
With a mixed pattern, one treatment often leaves part of the concern unaddressed. A 2023 review of nonsurgical neck treatment likewise separates submental fat from loose skin, suggesting cryolipolysis or fat-dissolving injections for fat and ultrasound or radiofrequency for mild to moderate laxity. We decide whether to reduce fat first and lift afterward or address both layers together. One patient who combined Ultherapy with CoolMini said the tissue beneath their chin had lifted and their face looked slimmer. In that case, both fat and sagging were treated.
How does Dong-An Joongsim Clinic treat a double chin?
At Dong-An Joongsim Clinic, your doctor personally handles your consultation and treatment. We assess submental fat thickness and the location of sagging before selecting devices and treatment order.
ONDA skin tightening treatment is planned by Dr. Soyoun Koo, Korea's first ONDA LIFTING EXPERT MEMBER. She uses the 3 mm and 7 mm handpieces separately to address submental firmness and lower-face fat. This approach can be especially suitable when a double chin comes with sagging cheeks or loose skin after rapid weight loss. Ultherapy PRIME reaches the fascial layer. At our certified Ultherapy clinic, the doctor uses real-time imaging to identify the layers and adjusts the line count to your face. Adequate coverage matters for a satisfactory result. Changes become clearer over time; one patient told us their jawline began to feel lifted after a few days. If the jawline has lost definition, we use Outline Contour Lifting to place CaHA, PCL, or PLLA along a planned jawline pattern. For thicker submental fat, we may add CoolSculpting CoolMini. Dr. Soyoun Koo has presented on submental cryolipolysis at medical conferences. In his March 2025 D&PS column, Dr. Chang-Hwan Cho explained to physicians how jowls form and the role of lifting devices.
What should you know before double-chin treatment?
Fat reduction appears gradually over several weeks. Significant weight gain can enlarge the remaining fat cells. Severe sagging or substantial excess skin may exceed what nonsurgical treatment can achieve, so we discuss realistic expectations at consultation. Tell us about cardiovascular, liver, or kidney disease, tumor treatment, pregnancy, or breastfeeding, as we do not recommend ONDA in these situations. Results and duration vary.
Double-chin treatment: common questions
How should I choose a double-chin clinic in Apgujeong, Gangnam, Seoul?
Check whether the clinic distinguishes fat from sagging when selecting devices, and whether a doctor personally consults and treats you. Near Apgujeong Rodeo Station, Dong-An Joongsim Clinic is a certified Ultherapy provider with Korea's first ONDA LIFTING EXPERT MEMBER on its medical team.
Why do I have a double chin when I have little fat?
Sagging skin and fascia can blur the jawline even with little fat, creating the appearance of a double chin. Lifting the jawline is then more appropriate than reducing fat.
Can I return to normal activities afterward?
You can resume normal activities after ONDA or Ultherapy. Any redness or swelling usually settles within a few days. Injectable contour lifting may cause bruising or swelling that lasts several days.
What affects the cost of double-chin treatment?
Cost depends on the devices and combinations used, area treated, and line count or injection volume. We explain the cost after your doctor examines the area beneath your chin.
References
- Do Kenny et al., “Cryolipolysis for Submental Fat Reduction: A Systematic Review and Meta-Analysis”, Facial Plastic Surgery, 2025. https://doi.org/10.1055/a-2628-3831
- Zappia Elena et al., “An innovative microwave technology for the treatment of submental skin laxity”, Lasers in Medical Science, 2025. https://doi.org/10.1007/s10103-024-04270-1
- Fabi Sabrina G et al., “Optimizing Patient Outcomes by Customizing Treatment With Microfocused Ultrasound With Visualization: Gold Standard Consensus Guidelines from an Expert Panel”, Journal of Drugs in Dermatology, 2019. https://pubmed.ncbi.nlm.nih.gov/31141851/
- Go Beatrice C et al., “Using injectable fillers for chin and jawline rejuvenation”, World Journal of Otorhinolaryngology - Head and Neck Surgery, 2023. https://doi.org/10.1002/wjo2.93
- Sturm Angela et al., “Nonsurgical Rejuvenation of the Neck”, Clinics in Plastic Surgery, 2023. https://doi.org/10.1016/j.cps.2022.12.014