Ultherapy tightens loose skin; fat-dissolving injections reduce fat. A double chin may need one or both.
Medically reviewed by [DOCTOR NAME], board-certified dermatologist · Doje Clinic, Apgujeong, Seoul · Last reviewed November 2026
Side by side
| Ultherapy | Fat-Dissolving Injections | |
|---|---|---|
| Category | Lifting & Tightening | Injectables |
| Procedure time | 45–90 minutes | 15–20 minutes |
| Sessions | Usually 1 session; many patients repeat yearly | Usually 2–4 sessions, 2–4 weeks apart |
| Downtime | Little to none; mild redness or swelling for a few hours to days | Swelling and tenderness for several days |
| Results appear | Some tightening early, main lift builds over 2–3 months | Gradual over 4–8 weeks |
| Results last | Often 12–18 months depending on age and skin | Treated fat cells do not return; weight changes still matter |
| Comfort | Deep heat and aching along the bone; topical numbing and paced energy help | Stinging and burning during injection |
How Ultherapy works
Focused ultrasound energy creates tiny thermal points at 1.5 mm, 3.0 mm and 4.5 mm depths, including the SMAS layer that surgeons tighten in a facelift. The controlled injury triggers new collagen over the following months.
How Fat-Dissolving Injections works
The solution disrupts fat cell membranes; the body then clears the fat over weeks.
Choose Ultherapy if you have
- early jowling and a softening jawline
- brow heaviness
- loose skin under the chin
- adults in their 30s–60s with mild to moderate laxity
Choose Fat-Dissolving Injections if you have
- double chin
- jowl fat
- small fat pockets on the face
Can you combine them?
Often, yes — your doctor will decide sequencing and timing based on your skin and travel dates.
Patient questions
Frequently asked questions
Which is better, Ultherapy or Fat-Dissolving Injections?
Ultherapy tightens loose skin; fat-dissolving injections reduce fat. A double chin may need one or both.
Which has less downtime, Ultherapy or Fat-Dissolving Injections?
Ultherapy: little to none; mild redness or swelling for a few hours to days. Fat-Dissolving Injections: swelling and tenderness for several days.
Which lasts longer?
Ultherapy: often 12–18 months depending on age and skin. Fat-Dissolving Injections: treated fat cells do not return; weight changes still matter.
Not sure which one is right for you?
A Doje Clinic dermatologist will recommend the option that fits your skin, goals and travel dates.
Medical information on this page is general and educational. Results, downtime and suitability vary by individual. A consultation with a Doje Clinic physician is required before any treatment.