Seven questions, and the honest answers
I have been asked these in roughly this order, several times a week, for thirteen years. The answers have barely changed. What has changed is the eighth question, which nobody was asking five years ago and everybody is asking now, and which I have added at the end.
1. How soon will I see something?
Around day three you will notice the muscle feels less willing. Full effect lands at ten to fourteen days.
The mistake is judging your result at day four and concluding it has not worked. I have had patients quietly book elsewhere in that window, which is a shame, because their treatment was working exactly on schedule. Give it two weeks, then come and see me.
2. How long does it last?
Three to four months, and the variation between people is wider than most expect.
Strong muscles metabolise it faster. So do people who train seriously, which is a genuinely irritating trade-off for the fittest patients in my clinic. Dose matters too, and a result that fades at ten weeks usually means the dose was conservative rather than that anything went wrong.
3. Is it addictive?
No. There is no dependence, no withdrawal, no physiological hook of any kind.
What is true is subtler. People become accustomed to seeing themselves looking rested, and when a familiar line returns it feels like a change rather than a return to baseline. That is a psychological adjustment, and it is worth naming rather than pretending it does not happen.
4. Will I look frozen?
Only if you are dosed to be frozen.
Frozen is not a property of the product. It is a decision, usually made by treating every muscle at full dose because that is simpler than working out which movements are actually creating the lines that bother you. Most of my patients want to look like themselves on a good day, and that means keeping some movement deliberately.
If you have seen a result you disliked, you have seen a dosing choice you disliked.
5. Will I build tolerance?
Rarely, and not in the way the question usually implies.
True resistance involves antibodies forming against the toxin, and it is associated with high doses at short intervals rather than with long-term cosmetic use. Treating no more often than every three months, at sensible doses, keeps that risk very low. If someone tells you they have stopped responding, the more common explanation is a change in product or technique.
6. What happens if I stop?
Movement returns over three to four months and your face goes back to where it would have been.
It does not rebound, it does not overshoot, and lines do not come back angrier. And the years you spent not creasing the same fold repeatedly are years of etching that did not happen. Stopping loses you the current effect, not the accumulated benefit.
7. When should I start?
When a line you can see at rest was not there two years ago.
Not at a birthday, and not because a friend did. Once a line is etched into the skin at rest, botulinum toxin softens it but no longer erases it, and you have moved from prevention to management. Catching that transition is the whole art of the timing question.
8. The one I now get asked most: what about pores, oil and texture?
This is the interesting part, and it is worth explaining properly because the internet is well ahead of the evidence.
Everything above describes botulinum toxin placed into muscle. Placed instead into the skin itself, heavily diluted and distributed across many tiny superficial injection points, it behaves differently. It never reaches the muscles of expression in any meaningful quantity. It acts on structures within the dermis.
The rationale is that sebaceous glands and the arrector pili muscles carry cholinergic receptors, and botulinum toxin interrupts acetylcholine release. Reduce that signalling in the skin and you reduce oil production, which in turn makes pores appear smaller, because a pore looks large partly in proportion to what it is producing.
What I see in practice. Less shine by the second or third week. Pores that photograph smaller, particularly across the central face. Skin that takes makeup better. A subtle smoothing of very fine surface lines that are not caused by movement at all. It is a change in skin quality rather than a change in shape, and patients often describe it as looking well rather than looking treated.
What I am careful to say. This is an off-label use. The product is registered for specific indications and this is not among them, which is lawful and common in aesthetic medicine but should be stated openly rather than discovered later. The published evidence is genuinely promising for sebum and pore appearance, thinner than its popularity implies, and mostly drawn from small studies. Effects are also shorter-lived than muscular treatment, typically two to three months.
It is not a treatment for acne. Reducing oil may help someone whose skin is oily and congested, but active acne is an inflammatory condition needing medical management, and I will say so rather than sell you an injection.
Scars, and where the evidence actually is
The most robust use here is preventive, and it is surgical rather than cosmetic in origin.
A healing wound sitting across a muscle is under constant tension every time that muscle contracts. Tension during healing produces wider, more raised scars. Relax the surrounding muscle for the months in which the wound is remodelling and it heals under less mechanical load, and the resulting scar tends to be finer. This is best evidenced for facial surgical wounds, particularly on the forehead and around the mouth, and the window for it is early.
For established scars the picture is weaker. There is interest in hypertrophic and keloid scarring, where botulinum toxin may influence fibroblast behaviour as well as tension, but the studies are small and it sits alongside rather than replacing intralesional treatment.
So if you are having a procedure that will leave a scar on a mobile part of the face, this is worth a conversation beforehand. If you have had a scar for six years, it is not the first thing I would reach for.
And pigmentation, where I would rather disappoint you
I get asked whether it helps melasma, and I want to be straight about it.
There are small studies reporting improvement, usually with botulinum toxin combined with something else, which makes attribution difficult. The proposed mechanisms are plausible but unproven. It is not something I offer as a pigmentation treatment.
In Asian skin we have better-evidenced options, and melasma is a condition where doing the wrong thing enthusiastically makes it worse. My colleague Dr. Farah writes about that properly, and I would send you to her before I would reach for a syringe.
Frequently asked questions
Something usually shifts around day three, with the full effect at ten to fourteen days. If you are judging your result on day four you are judging it too early, and we would rather review you at two weeks than adjust something that has not finished settling.
Three to four months for most people. Metabolism, muscle strength, dose and how much you exercise all move that number. Patients who train hard often find it fades faster, which is inconvenient and entirely normal.
No. There is no physical dependence and no withdrawal. What is real is that people get used to seeing themselves rested, and the return of a line they had forgotten about can feel abrupt. That is a psychological adjustment rather than a pharmacological one.
Genuine antibody-mediated resistance exists but is uncommon at cosmetic doses. It is associated with high doses and short intervals rather than long-term use, which is one reason we do not treat more often than every three months and do not chase every returning flicker.
Muscle activity returns gradually over three to four months and your face goes back to where it would have been anyway. It does not overshoot, and lines do not come back worse. Anything you did prevent during treatment stays prevented.
Injected into the skin rather than the muscle, in very small diluted amounts, there is reasonable evidence that it reduces sebum production and the appearance of pore size, with improvement in texture and fine surface lines. It is an off-label use, results are subtler than social media suggests, and it does not replace medical management of acne.
The strongest evidence is preventive rather than corrective. Relaxing the muscle around a fresh surgical or traumatic wound reduces the tension pulling on it while it heals, and scars formed under less tension tend to be finer. For established scars the evidence is weaker, and for keloid it is investigational.
This is the claim I am most cautious about. Some small studies report improvement when it is combined with other treatments, but the evidence is thin and the mechanism is unclear. I would not offer it as a pigmentation treatment, and in Asian skin there are better-evidenced options.
The short version
In muscle, botulinum toxin is one of the most predictable things in aesthetic medicine, and most bad results are dosing decisions rather than product failures.
In skin, it is doing something genuinely different and rather interesting, with real but early evidence, off-label status, and effects that are subtler and shorter than the internet suggests.
Both are worth having. Neither is worth overstating, and I would rather you arrived knowing which one you are asking for.
This article is general educational information about aesthetic medical procedures. It is not medical advice, a diagnosis, or an offer of treatment. Botulinum toxin is a prescription medicine registered in Malaysia by the National Pharmaceutical Regulatory Agency and is supplied and administered only by registered medical practitioners. Intradermal use for skin quality, and use for scarring, are off-label applications. All procedures carry risks, suitability and outcomes vary between individuals, and no result can be guaranteed.