What Injections Work Best for Sunken, Thinning Skin Around the Mouth?

Let me start with the conclusion: sunken tissue around the mouth is rarely fixed by a single filler injection. You first need to figure out whether the problem is structural support loss, fat loss, or a combination of volume loss and laxity — and only then decide what's actually needed.

First, Identify the Type

Insufficient structural support: pronounced nasolabial folds and downturned mouth corners, with a hollow line running from the nose base to the mouth. This is fundamentally a deep support problem, and filling only the superficial layer tends to just pile product on the surface.

Fat loss: overall flattening of the mid-face with age, leaving the area around the mouth looking hollow and lacking elasticity. This usually needs deep support combined with superficial filling.

Volume loss plus laxity: hollowing and obvious looseness together. Overfilling in this case tends to make the mid-face look stiff, and the result stops looking natural when you smile.

During your consultation, it's worth having the doctor press on different layers with their fingers to work out where the loss actually sits. That step matters far more than which product gets chosen.

The Common Injection Approaches

1. Hyaluronic Acid Fillers

The most standard option, suitable for mild to moderate hollowing. It's placed at two depths around the mouth — the deep support layer and the subcutaneous layer — to lift from underneath and smooth the surface at the same time.

The advantage is that it's dissolvable, adjustable if you don't like it, and relatively controllable in terms of safety. The drawback is that it doesn't last forever, generally somewhere between 6 and 18 months depending on the product and location.

Note that the mouth area is highly mobile. Use less, not more. Too much and you end up with a puffy, "pursed mouth" look and visible bumps when you smile.

2. PLLA-Based Injectables (Sculptra-type materials)

Poly-L-lactic acid materials work on two fronts at once: they break down gradually while stimulating your body to produce its own collagen. These suit people who have hollowing combined with laxity and want to improve texture at the same time.

Because the effect relies on your own collagen being rebuilt, results come more slowly — usually appearing over 1 to 3 months — but they last longer, with many people holding results for one to two years.

The tradeoff is that these cost noticeably more than standard hyaluronic acid, and they demand a higher level of technique in terms of layering and placement. Get the depth wrong and you can end up with nodules.

3. Collagen-Based Fillers

Recombinant collagen and injectable collagen products work through a combination of biological stimulation and direct filling. They look natural in thin areas like the mouth region, without the slightly plastic quality some hyaluronic acid products have.

The downside is a higher price per unit, and some products require multiple intradermal injection points, which takes longer.

4. Younger-Looking HA (Multi-Crosslinked HA)

Multi-crosslinked or small-molecule hyaluronic acid developed for facial rejuvenation — strong support, good spreadability, well suited to covering larger surface areas around the mouth.

For authenticity checks: the Korean version carries Korean text and MFDS approval numbers, while the European version shows the CE mark with English or European-language labeling. Check the lot number and expiry date in either case.

5. Skin Boosters

Strictly speaking not a filler — this injects hyaluronic acid and nutrients into the superficial dermis to raise hydration and radiance. Helpful if your skin looks dull and dehydrated with fine lines around the mouth, but it's an enhancement rather than a structural fix.

My Suggestion

Mild hollowing, mainly fine lines: start with layered hyaluronic acid, or go straight to skin boosters.

Moderate hollowing plus laxity: PLLA-based or collagen-based injectables handle both problems in one course.

Severe hollowing with obvious "parenthesis" lines when you smile: build the deep support first, then refine the surface. Don't focus only on the top layer.

A Few Common Mistakes

Assuming one session is enough. Volume around the mouth usually needs assessment plus follow-up topping up as standard.

Going purely on price. The mouth area is one of the more technically demanding regions for facial injection — misplaced product can cause asymmetry, nodules, or local bulges.

Ignoring overall facial balance. Filling around the mouth should be assessed together with the mid-face contour. In some people, the real issue is overall mid-face descent, and filling only the mouth area leaves things looking off.

Overlooking maintenance. How fast filler breaks down varies between individuals, and sleep, diet, smoking, and alcohol all affect how long it lasts.

Before You Go

Consult online first to check the doctor's real experience and aesthetic sense in this area, and look at actual cases rather than institutional marketing. Then communicate clearly in person — say "natural" explicitly. That's more useful than any product recommendation.

Settle on your budget range and acceptable recovery window, and get the full cost confirmed in one go, including pricing for follow-up top-ups.

If you're doing this in Korea, RomanticJiangnan lets you compare real prices and cases across clinics before deciding, rather than rushing into it.

This article is for reference only. The specific approach should be determined by the treating doctor based on your individual facial structure.