Fat-dissolving injection results timeline

Fat-dissolving injections deliver a solution into a small fat pocket to break down fat cells, which the body then clears over several weeks. Formulations vary, and your doctor will explain which product is used and why. Because each session removes only part of the pocket, results build gradually across a short series.

When	What you may notice	What is happening
Day 0	Warmth, stinging or tingling, then swelling	The solution acts on fat cells
Days 1–3	Peak swelling, tenderness, firmness; possible numbness or bruising	Inflammatory response as cells break down
Days 4–7	Swelling settles; area may still feel firm	Healing continues
Weeks 2–6	Gradual reduction in fullness	The body clears treated fat
After 2–4 sessions	A clearer, more defined contour	Cumulative reduction

The swelling under the chin in the first few days is often the part people find most surprising. It is an expected sign that the solution is working, not a sign that something has gone wrong, and it settles within days. Read more about the treatment on our fat-dissolving injection page.

What improves and what doesn't

Usually improves

A small double chin
Soft fat along the jowls
Localized fullness in the lower cheeks
Small pockets on the body, as your doctor advises

Usually does not change

A wide jaw caused by the masseter muscle
Loose skin, which may need tightening as fat reduces
Large areas of fat, which are a weight or surgical question
Fullness caused by bone structure

Factors that influence your results

Size of the pocket: small, well-defined pockets respond best.
Number of sessions: most people need two to four.
Skin elasticity: firmer skin adapts well; looser skin may need tightening alongside.
Weight stability: remaining fat cells can grow if you gain weight.
Correct diagnosis: fat responds; muscle and bone do not.

How to maximize and maintain your results

A slimmer lower face often needs more than one approach. If the masseter muscle adds width, see jaw Botox vs fat-dissolving injection. If skin is slightly loose, Shurink Universe can tighten the jawline. The V-Line Contour Package combines all three in one plan.

Use a cold compress gently in the first day.
Sleep with your head slightly raised for a couple of nights.
Avoid saunas, intense exercise and alcohol for a day or two.
Keep your weight steady to protect the result.

Realistic expectations and when to repeat

Expect a gradual, natural refinement over several sessions, not a dramatic change after one. The swelling in the first days can look worse before it looks better, so plan sessions away from photos and events; our guide to planning treatments around your Seoul itinerary helps. Because sessions are spaced several weeks apart, the full course suits people who live in Seoul or visit regularly; on a single short trip, one session is still a useful start. Fat cells that are destroyed are not replaced, so results tend to be long-lasting while your weight is stable. Current options are on the fat-dissolving injection price page. Prices are in Korean won (KRW), exclude 10% VAT, and are confirmed at your consultation.

Tracking your progress

Take photos before your first session and before each later session, not during the swelling phase.
Use the same light, time of day and camera height.
Take side profiles with your chin level and a front view with your face relaxed.
Note your weight on each photo day.

If your results aren't what you expected

Judge the result four to six weeks after each session. If you see little change after two sessions, contact Dernia with your photos so your doctor can review them. The fullness may be partly muscle or loose skin, which needs a different approach. Numbness or firmness that lasts beyond a few weeks, or any change in your smile, should also be reported. See our other results guides for related treatments.

How long does swelling last after fat-dissolving injections?

Swelling usually lasts two to five days and can be quite noticeable under the chin. It is a normal part of the process.

When will I see results?

Gradual reduction shows over four to six weeks after each session. A clearer contour usually appears after two to four sessions.

How many sessions do I need?

Most people need two to four sessions, spaced a few weeks apart. Your doctor will advise based on the size of the area.

Are the results permanent?

Fat cells that are destroyed are not replaced, so results tend to be long-lasting. Remaining fat cells can still grow if you gain weight.

Can I combine fat-dissolving injections with jaw Botox?

Yes. Many lower faces look wide because of both fat and muscle, and combining the two treatments is common. Your doctor will confirm the plan.

Dernia Clinic Myeongdong

Fat-Dissolving Injection Results: Timeline and What to Expect