Full face neurotoxin injection done well is subtle, balanced and tailored to the patient’s musculature. I see a lot of it done on young patients who don’t need anywhere near that much product. It’s great to use one of the toxins for prevention, but you can go overboard. The errors I see most often are dose, template injecting, missed muscles and incorrect placements.
What does a full face treatment involve?
A full face treatment addresses multiple muscle groups in one session. That usually includes the frontalis, the glabellar complex and the lateral orbicularis oculi. In the lower face it can extend to the depressor anguli oris (DAO) and the masseters.
The aim is balance across the whole face, not just smoothing individual areas. That’s where it gets more difficult. Every muscle you treat changes how the neighbouring muscles behave, so the plan has to account for the face as a whole.
Why do full face treatments end up overdone?
“Overdon”e results usually come from overdosing a patient who didn’t need it, and from injecting to a fixed pattern.
Having a basic template of “right, this is how you inject” is actually not correct. You want to see the muscle movement, and you want to adjust your injection points to that movement. Frontalis patterns vary a lot between patients. A grid that suits one forehead will over-treat or under-treat another.
Younger patients seeking prevention are where overdosing creeps in. Minimal dynamic lines don’t call for maximal dosing. A lighter plan that you top up at review is almost always the better call.
How do you spot a poorly planned full face treatment?
The telltale signs are a flat, lowered brow, a frozen forehead, and a lower face that doesn’t match the upper face.
The forehead. If the frontalis is treated in a very flat line straight across, it can flatten the eyebrow out. You lose the natural arch, and the brow can sit heavy.
Missed DAOs. The DAOs are very important and very difficult to do well, and they’re often left out entirely. In a heavily treated face, a smooth upper third paired with an untreated DAO can leave the oral commissures pulling down. That mismatch reads as off, even if the patient can’t say why.
High masseter placement. Injecting the masseters too high risks diffusion into the smile musculature, particularly the risorius and zygomaticus major. That can cause a droop at the corner of the mouth. Mouth droops are very distressing for patients and can last quite a long time.
How do you prevent an overdone result?
Assess dynamic movement first, then place and dose to what you see.
Get the patient to move their forehead so you can look at how their muscles are working. I often inject the frontalis in a slight arch. That way, when patients raise their brows, they keep some movement. They usually don’t want to be too frozen, and preserving movement in the middle of the brow keeps the arch. Going straight across is what flattens it.
For the masseters, you really don’t want to go too high. Draw a line between the ear and the corner of the mouth, and stay in the lower third of that line to prevent problems.
And across the whole face, it’s better to top up because you haven’t put enough in, or it’s sitting a bit low, than to give someone a mouth droop. You can add at review. You can’t take product out. Our cosmetic nurse course covers forehead, glabellar and crow’s feet neurotoxin technique in detail.
How do you manage an overdone or misplaced treatment?
Management starts conservatively. Most toxin complications are temporary and resolve as neuromuscular function returns.
Reassure, document and review. See the patient promptly, take photographs and assess muscle function. Explain the expected timeline honestly. Patient distress is often the biggest issue, so clear communication and follow-up matter.
Correct asymmetry with small, targeted doses. Where an asymmetry is caused by under-treatment on one side, a conservative top-up can restore balance. Where a brow is sitting low, small doses to a depressor may help, depending on the presentation. Treating the affected muscle further is rarely the answer.
Time, for lower face complications. An oral commissure droop from masseter diffusion generally needs to wear off. Adding product nearby carries a real risk of making it worse.
Refer when uncertain. If the presentation is unusual, or you’re not confident managing it, involve a supervising or more experienced medical practitioner early.
Frequently asked questions
Should every full face treatment include the DAOs?
The DAOs should be assessed in every patient, but only treated where they’re contributing to the concern. Poor DAO technique carries its own risks to lip function and symmetry.
How soon should a review be booked?
Around two weeks after treatment is common, once the toxin’s full effect has developed.
Is it safe to treat the upper face and masseters in one session?
It can be, provided each area is assessed and dosed individually and total dose is considered.
What if the patient asks for a completely still forehead?
Discuss the trade-off. Full frontalis paralysis increases the risk of brow heaviness, particularly in patients with existing brow ptosis or hooding.
How do I learn masseter and DAO technique safely?
Through supervised, hands-on training with an experienced trainer, building from upper face treatments before progressing to the lower face.
Refine your technique
If you want to sharpen the subtleties of full face planning, from reading frontalis movement to safe lower face placement, explore our training at Cosmetic Injector Institute. Courses are open to eligible doctors and nurses, so check who we train to see if you qualify.
Disclaimer: This article is educational content intended for registered health practitioners and does not replace formal training, clinical supervision or individual patient assessment. Techniques described should only be performed by appropriately qualified and trained practitioners working within their scope of practice. All medical and cosmetic procedures carry risks, and outcomes vary between individuals.