In short. Rest and smile, where the cheek sits, what the skin does when it is moved, and the dental and jaw contribution. What an examination settles that a photograph cannot.
Key points
- Lift the cheek gently upward and outward with a finger.
- Where the fold is produced by a cheek that has descended or lost volume, the groove softens as the cheek moves.
- Where the fold is normal anatomy, lifting changes very little.
A photograph shows a groove. It does not show whether the cheek has descended, whether volume has been lost, whether the bone has changed or whether the fold is simply anatomy. Those four produce a similar-looking line and answer to different plans, and separating them takes a few minutes in person. This guide is about that examination and nothing else.
Rest first, then a smile
The face is looked at with the muscles relaxed before anything is asked of it. A fold that is faint at rest and deep in a smile is driven by muscle action and by the way the cheek folds against the lip. A fold already deep at rest is structural. The two are not treated in the same way, and the difference disappears in a photograph taken in a single expression.
Where the cheek sits
The position of the cheek relative to the corner of the mouth and the eye is noted, in profile as well as from the front. The examiner looks for a cheek pad that has dropped below the line it once occupied, and for loss of projection over the midface. In an adult face this is usually the observation that explains the groove.
The single most useful test
Lift the cheek gently upward and outward with a finger. Where the fold is produced by a cheek that has descended or lost volume, the groove softens as the cheek moves. Where the fold is normal anatomy, lifting changes very little. It takes seconds and needs no equipment.
What the skin does when it is moved
The skin over the fold is lifted between the fingers and released. Skin that springs back is contributing little, and a plan aimed at the surface will not change the fold. Skin that stays where it has been placed, or that has lost its recoil, is part of how sharp the fold looks. Sun exposure, smoking and skin thickness are asked about at the same time.
The mouth, the teeth and the jaw
The fold is examined with the mouth open and the jaw moved, and the teeth, the bite and the gums are discussed. Long-standing dental problems, missing teeth and jaw joint trouble change the support under the upper lip, and the fold changes with it. Finding a dental cause redirects the whole plan.
Findings that stop the aesthetic conversation
- A fold that appeared over weeks, or is present on one side only.
- Weakness on one side of the face, numbness in the cheek or lip, or difficulty closing an eye.
- A lump that can be felt, or skin over the fold that has changed colour or broken down.
What each cause contributes, ranked by how much of it can be changed, is set out in the guide to causes. The reason treatment aimed at the groove itself goes wrong is explained in why a flat fill disappoints, and the sequence of measures that comes before any of it is described in the conservative rungs.
Frequently asked questions
What should I expect during an examination of the fold?
An examination rather than a presentation. The face is looked at with the muscles relaxed and then in a full smile, in profile as well as from the front; the position of the cheek and the behaviour of the skin are noted; and the mouth, teeth and bite are asked about. You should leave knowing what is producing your fold and whether anything should be done about it.
Why does the examination ask about my teeth and my bite?
Because the support under the upper lip comes partly from what is inside the mouth. Missing teeth, gum disease, an infected tooth and jaw joint trouble all change that support, and the fold changes with it. Where the mouth is the cause, treating the face is treating the wrong end of the problem, and no amount of volume placed in the cheek corrects it.
Can photographs show how the cheek sits against the mouth corner?
A photograph is useful as a record of what you see, and it is not an assessment. It captures one expression in one light, it cannot show where the cheek sits relative to the corner of the mouth, and it cannot show how the skin moves when it is lifted. Send them if you have them, and expect to be examined in person before any plan is discussed.
Risks & Limitations
- Filling the fold itself rather than the cheek widens the midface, and correcting that is harder than the original complaint.
- Material placed deep in this region can enter a vessel and obstruct the blood supply to skin, which is why the area is treated with more caution than most.
- Support placed to restore the cheek changes the midface without restoring a cheek that has genuinely descended.
- Thread lifting is temporary by design, and no rung on the ladder removes the fold itself.
When to Seek Care
- A fold that appeared over weeks, or is present on one side only.
- Weakness on one side of the face, numbness in the cheek or lip, drooling, or difficulty closing an eye — seek urgent care.
- Skin in a treated area that turns pale, grey, mottled or blistered, or severe pain after an injection.
- A lump that can be felt in the cheek or lip, or swelling with pain, redness or warmth.
References & Further Reading
- American Society of Plastic Surgeons (ASPS) — procedure and safety guidance
- National Institute for Health and Care Excellence (NICE, UK) — relevant guidance
- Cochrane Library — systematic reviews
- Chinese Medical Association Plastic Surgery Branch — clinical guidance
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.