Double chin injections are one of the most popular non-surgical treatments in Korea for creating a slimmer, sharper jawline. They work by breaking down fat under the chin, allowing the body to gradually eliminate it over several weeks.

But the most common question patients ask is:
“How fast will I see results?”

Here is a clear, Korea-focused guide on what to expect after treatment.

How Double Chin Injections Work

Korean fat-dissolving injections use lipolytic solutions that break down submental fat. Once the fat cell membrane is disrupted, the body metabolizes it naturally through the lymphatic system.

Because this process takes time, results appear gradually, not instantly.

When Do Results Start to Appear?

Initial changes: 1–2 weeks

Most patients begin noticing subtle slimming within the first 10–14 days, especially if swelling reduces quickly.

Visible improvement: 3–4 weeks

By weeks 3 to 4, the contour becomes noticeably slimmer. Clothing fit (scarves, collars), selfies, and side profiles usually reveal the improvement first.

Full results: 5–6 weeks

The complete effect typically appears around 5–6 weeks after the injection, once the body has fully cleared the dissolved fat.

Why Results Take Time

Double chin injections rely on the body’s natural fat-clearing process. Unlike fillers or Botox — which show immediate effects — lipolysis involves:

• Fat membrane breakdown
• Fat metabolism
• Lymphatic drainage
• Tissue remodeling

This biological timeline cannot be rushed, but it leads to natural-looking, gradual slimming rather than a sudden or artificial change.

How Many Sessions Are Needed for Best Results?

Most patients require more than one session, especially if the double chin is moderate to severe.

1 session

• Mild refinement
• Suitable for very small pockets of fat

2 sessions

• Noticeable slimming
• Ideal for most first-time patients

3–4 sessions

• Strong reduction for fuller double chins
• Best for men or people with naturally thicker fat pads

Korean clinics often space sessions 2–4 weeks apart to allow the area to heal before the next treatment.

What Affects How Fast You See Results?

✔ Amount of fat

Thicker fat layers take longer to break down and drain.

✔ Injection formula and dosing

Higher doses may show stronger results but also cause more swelling.

✔ Skin elasticity

Tighter skin shows results faster; looser skin may need HIFU or RF added.

✔ Hydration and lymphatic speed

Better hydration improves metabolism of dissolved fat.

✔ Swelling duration

People who swell for longer may not see results until swelling subsides.

What Does the First Week Feel Like?

Day 1–3: Swelling

Expect mild to moderate swelling — this is normal and temporary.

Day 4–7: Smoothing phase

Swelling reduces, but slimming is not yet visible.

Week 2: “Is it working?” phase

Most patients start noticing small changes here.

Week 3–6: Transformation phase**

The chin line becomes sharper and more defined.

How Korea Enhances and Speeds Up Results

Korean dermatology clinics often combine injections with tightening devices for faster, more sculpted results:

✔ HIFU (deep tissue lifting)

Improves definition and tightens any loose skin.

✔ RF tightening (surface firming)

Enhances elasticity and speeds up lymphatic drainage.

✔ Jawline Botox (if muscles are bulky)

Helps create a cleaner angle under the jaw.

These combination treatments make Korea especially effective for double chin contouring.

When To Consider Additional Sessions

You may benefit from another session if:

• You still see fullness at week 6
• The fat pocket is naturally thick or genetically persistent
• You want a sharper or more defined jawline
• You combine your results with lifting treatments

Most patients refine the area over 2–3 injections for the best aesthetic balance.

Final Answer: How Fast Are Results?

Mild visible change: 1–2 weeks

Clear improvement: 3–4 weeks

Full results: 5–6 weeks

Best overall results: After 2–3 sessions

Double chin injections in Korea offer steady, natural-looking slimming — not an overnight transformation. The gradual change makes results appear refined, subtle, and extremely natural.