By LIV Clinic · Medically reviewed by Dr. Narathai Vichienkalayarut, M.D. · Published September 20, 2026

A double chin can be fat, loose skin, a weak chin, or all three — and each answer points to a different treatment.

What is the best treatment for a double chin without surgery? It depends on the cause — fat dissolving injections suit genuine submental fat, HIFU or radiofrequency suit loose skin, and chin filler helps when a weak chin is the underlying issue; often a combination gives the best result.

First, identify the cause

Three different problems

A fuller under-chin can come from excess fat, loose skin, or a recessed chin that makes the area look heavier — and sometimes all three together.

• Excess fat under the chin (submental fat)
• Loose or lax skin in the area
• A recessed chin that makes the area look fuller
• Reduced jawline definition
• Often a combination of two or three of these

Why it matters

Treating loose skin with fat injections, or fat with tightening, wastes money and disappoints — which is why assessment comes first.

If the cause is fat

Fat dissolving injections

Deoxycholic acid injection is used to improve the appearance of moderate to severe submental fat by breaking down cells in fatty tissue.

Protocol

Typically two to six sessions at least a month apart — see our guide to fat dissolving injections.

If the cause is loose skin

Energy-based tightening

HIFU delivers focused ultrasound to deeper layers, while radiofrequency heats the dermis — both stimulate collagen to firm the area over months.

Thread lifts

A thread lift can reposition sagging tissue for a more immediate lift, with a few days of recovery.

If the cause is a weak chin

Chin filler

A recessed chin makes the submental area look fuller. Filler that adds projection can improve the profile considerably — see chin filler for a weak chin.

Jawline definition

Defining the jawline often improves how the whole lower face reads.

Matching treatment to cause

A consultation identifies which applies to you.

When combination works best

Fat plus laxity

Many people have both, so a plan may reduce fat first and then tighten the skin — sequenced so each treatment can be assessed.

Adding structure

Chin or jawline filler often completes the result by improving the profile.

What none of these can do

Not for large volumes

Significant fat or heavy, hanging skin is beyond non-surgical treatment — surgery is the honest answer in those cases.

Not weight loss

None of these reduce body weight, and a stable weight protects whatever result you achieve.

How to choose your treatment

A practical sequence:

1. Have a consultation to identify whether the cause is fat, skin or chin projection.
2. Ask which treatment addresses your specific cause.
3. Discuss whether a combination would work better.
4. Agree realistic timeframes for results.
5. Confirm the number of sessions and total cost.
6. Maintain a stable weight to protect your result.

Double chin treatment at LIV Clinic Koh Samui

At LIV Clinic, Dr. Narathai assesses the cause before recommending lipolysis injections, skin tightening, filler or a combination. Book a consultation.

Frequently asked questions

Safety and consultation

Non-surgical double chin treatment is a medical injectable procedure and, like any injection, carries some risk — common temporary effects can include swelling, bruising, tenderness, numbness or firmness in the treated area, and less common reactions are possible. Results vary from person to person, and no specific outcome can be promised. This article is general information, not medical advice.

At LIV Clinic, every treatment begins with an in-person assessment by Dr. Narathai Vichienkalayarut, M.D., who reviews your skin, medical history and goals before recommending a personalized plan. Book a consultation to find out whether this treatment suits you.