In short. Static folds are lines present at rest, and filler softens only those made of lost volume. A fold caused by descent, by bone and ligament change, or by all three, does not respond at any volume, because adding material changes fullness without moving the tissue back.

Key points

  • Filler softens folds made of lost volume, not folds made of descent.
  • A shallow crease caused by descent will not respond to filling.
  • A deep hollow caused by volume loss can respond substantially.
  • Filling a descended face can make it look heavier rather than fresher.
  • Filler cannot reposition descended tissue, remove skin, or replace structural support.

Which folds does filler soften?

Filler is often described as the treatment for folds, and that description is too broad to plan from. A fold that is there at rest can be made of lost volume, of descent, of the underlying bone and ligament structure, or of all three, and only one of those responds to adding material beneath the skin.

A hollow that has developed gradually, a flattening of the cheek or the temple, a depressed scar, and a crease that appeared as the face lost volume are the findings filler addresses. In these, the tissue that was there has diminished, and replacing material restores the contour the surface sits on. The change is visible once the swelling settles, which is the point at which the result should be judged rather than the day of treatment.

Why the same fold responds differently in two people

A fold running from the nose to the mouth can be present in a face that has lost mid-face volume and filled the crease as a result, or in a face where the mid-face has descended and carried the tissue with it. The first is a volume problem and responds. The second is a position problem, and adding volume beneath it changes how full the area looks without changing where the tissue sits.

Which folds are descent, and why do they not respond?

Where the tissue has moved downward, adding material beneath it does not move it back. The cheek sits where it sits, the jawline loses definition because what defined it has descended, and a fold deepens because the tissue above it has dropped rather than because it deflated. This is the single most common planning error in injectable practice, and it is worth naming plainly: filling a descended face can make the face look heavier rather than fresher, and the patient may correctly report that something changed for the worse.

Finding at rest What it is made of What filling does What the result should be judged on
Hollow that developed gradually, flattened cheek or temple, depressed scar, crease after volume loss Lost volume Restores the contour the surface sits on The contour once the swelling settles, not on the day of treatment
Fold after the mid-face has descended Descended tissue Changes how full the area looks, not where the tissue sits Not fullness, because the tissue has not moved
Jawline that has lost definition Tissue that has moved downward Changes fullness without moving the tissue back Not filling, because what defined it has descended
Shallow crease caused entirely by descent Descended tissue Changes fullness without moving the tissue back Not filling, because the crease is a position problem
Fold produced by bone and ligament change Changed structural support Nothing, because the structural component is not replaced by gel Not filling, because gel does not replace the structure

What filler cannot do at any volume

  • Reposition descended tissue. Volume is added where it is placed, and it does not lift what sits above it.
  • Remove skin. Laxity and excess skin are not volume findings, and material under the skin does not tighten it.
  • Correct a fold produced by bone and ligament change. The structural component is not replaced by gel.

Is a deep fold easier to treat than a shallow one?

The distinction is not between deep and shallow folds. A shallow crease caused entirely by descent will not respond to filling, and a deep hollow caused entirely by volume loss will respond substantially. What matters is what the fold is made of.

What should you ask before a fold is filled?

Before agreeing to a fold being filled, ask what the fold is made of and what the treatment is expected to change. If the answer describes volume, the plan is coherent. If it describes sagging, the plan is not addressing the finding.

Sources

Internal links

Frequently asked questions

Does adding volume to a deep fold actually remove it?

It softens it rather than removing it. Filler placed beneath a fold lifts the surface over it, which reduces the depth of the crease. The fold is usually a combination of lost volume and a structure that has always been there, and only the volume component responds. Complete removal is not a realistic expectation and it is not what an honest plan offers.

Why does filler sometimes make a face look heavier?

Because volume was added to tissue that had descended rather than deflated. If the cheek has moved downward, adding material beneath it increases the weight sitting low on the face, and the face can read as fuller without reading as fresher. That is a planning error rather than a property of the material.

Are there areas where filler should not be used at all?

There are areas where the risk is high enough that the decision needs to be made carefully: the region around the eye, the nose, the temples near vessels, and the glabella. Material placed into a blood vessel there can obstruct it, which is a medical emergency. That does not make the areas untreatable; it makes the injector, the setting and the ability to manage a complication the deciding factors.

Risks & Limitations

  • Bruising and swelling after either treatment; with filler, swelling can be marked for several days and changes the shape of the area until it settles.
  • Weakening of a neighbouring muscle after a muscle-relaxing injectable, producing a brow or eyelid droop or an asymmetry between the two sides.
  • Lumps, irregularity or an unnatural contour after filler, which can appear immediately or become visible later as the material settles.
  • Vascular occlusion after filler — material obstructing a blood vessel, which threatens the tissue it supplies and is a medical emergency.
  • Delayed reactions, nodules and infection after filler, sometimes appearing well after treatment.
  • Both treatments are temporary and both are repeated. Neither stops the muscle from moving or the face from continuing to change.
  • Muscle relaxation has no reversal agent and has to be waited out; a dissolvable gel filler can be partly broken down with an enzyme, but not every material can.
  • No outcome is guaranteed, and individual response varies with the area, the anatomy and the material used.

When to Seek Care

  • Sudden severe pain after filler, or skin that turns white, dusky or mottled — contact the treating team the same day.
  • Any change in vision after an injection on the face — seek emergency care immediately.
  • Fever, spreading redness, or a painful swelling that is worsening rather than settling.
  • A lump that is increasing, or skin breakdown over an area that has been injected.
  • Difficulty breathing, or swelling of the lips, tongue or throat — seek emergency care immediately.
  • A droop or asymmetry that is not improving as the treatment fades, for review and possible adjustment.

References & Further Reading

  • American Society of Plastic Surgeons (ASPS) — injectable and dermal filler safety guidance
  • National Institute for Health and Care Excellence (NICE, UK) — relevant guidance on non-surgical cosmetic procedures
  • Cochrane Library — systematic reviews in injectable facial aesthetics
  • Chinese Medical Association Plastic Surgery Branch — clinical guidance

Medically reviewed by Ke He, MD (何锞), Deputy Director & Head of Skin & Laser Aesthetics. Last reviewed: 19 September 2026.

This page is patient education, not medical advice, and it does not cite individual studies. Discuss your own case with a qualified clinician. To arrange an assessment at Chongqing West District Hospital, see Contact & Consultation.