In short. Rest and animation, brow position, asymmetry and which depressor dominates: the observations an assessment makes, and what each one settles before any plan.
Key points
- A description rather than a prescription: how much of the crease is movement and how much is etched, which of the two depressors is doing most of the work, where the brow and the lid edge sit now, and whether the two sides match.
- Those findings decide which options are worth discussing.
The assessment of a glabellar crease is a sequence of observations rather than a test. It takes a few minutes and the order matters: the resting face is examined before it is asked to do anything, because a face does not return completely to rest straight after a frown.
The face at rest comes first
With the face relaxed and the light coming from in front rather than from above, the crease is recorded as it is. Whatever is visible then is the component that lives in the skin. Light from above exaggerates every groove, so the same line can look considerably deeper depending on where the lamp is standing.
Then the same face under a held frown
The patient frowns as hard as possible and holds it while the glabella is examined. A line that appears under load and disappears at rest is made by muscle pull, and answers to the rung that reduces it. A line that is equally deep in both states is largely etched. Most lines sit between the two, and the proportion is the most useful single finding the assessment produces.
Brow position, before anything is discussed
The height of the medial brow, the shape of the arch and the position of the lid edge are recorded at rest. These are not extra measurements: they are what the brow-position trade is judged against, because the muscles under consideration hold the inner brow down. A brow that already sits high has less room to move before the movement becomes the complaint.
What the assessment produces
A description rather than a prescription: how much of the crease is movement and how much is etched, which of the two depressors is doing most of the work, where the brow and the lid edge sit now, and whether the two sides match. Those findings decide which options are worth discussing.
The two sides compared in the same light
Asymmetry is examined at rest and again under a held frown. Almost every face has a dominant side and one column that is deeper, and where the difference has been stable for years it is part of the face. A difference that is new, or that comes with any weakness, is a finding to investigate rather than a line to treat.
Findings that pause the assessment
- A crease that has appeared over weeks, or that is present on one side of a face that was symmetrical.
- A brow or an eyelid that has begun to droop, weakness or numbness on one side of the face, or difficulty closing the eye.
- Any change in vision, double vision, or a headache that has come with a change in vision.
What the direction of the crease already tells the examiner is explained in why frown lines are vertical. Why one side is so often deeper is covered in frown lines and asymmetry, and the part of the line the assessment describes as etched is set out in why these lines etch so deeply.
Frequently asked questions
Why does the resting face have to be examined before the frowning face?
Because a face does not return completely to rest straight after it has been frowning. If the movements are examined first, the residual tension flatters the muscle component and hides part of the etched one. Recording the resting face first keeps the two observations separate, which is the whole point of making both.
What does it mean if the line disappears when I relax?
It means the crease is being produced by muscle pull and almost nothing else, because a fold that vanishes at rest has not yet left a groove in the skin. That is the presentation the rung aimed at the muscle reaches most completely. It does not mean the line is unimportant, only that the moving part is all of it.
Is the assessment the same if I have had treatment before?
No, and the timing is the reason. Previous relaxing treatment changes how much movement is available to examine, so what can be seen depends on when it was last given. Previous resurfacing changes how the skin behaves and how it is likely to respond. Both belong in the history, and a plan made without them is made on incomplete information.
Risks & Limitations
- Relaxing the corrugator and the procerus also lifts the medial brow, and in a brow that already sits high that lift can become the complaint rather than the result.
- A drooping eyelid, double vision, or difficulty swallowing, speaking or breathing after an injection needs emergency care rather than a wait-and-see approach.
- Resurfacing carries a risk of pigment change and, rarely, of scarring, and its result is judged weeks after the last session rather than on the following morning.
- No rung removes a crease that is established in the skin. A line that is visible at rest usually softens, and any statement that promises more should be treated with suspicion.
When to Seek Care
- Difficulty breathing, chest pain, or difficulty swallowing or speaking after an injection needs emergency care immediately.
- A drooping eyelid, double vision, or an eye that will not close fully after treatment.
- Weakness or numbness on one side of the face, or a brow that has dropped on one side.
- A crease that has appeared or deepened over weeks rather than years, or any change in vision on one side.
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.