Procedure

Botox

An injection that temporarily weakens specific facial muscles, so the lines those muscles make soften. It wears off in about three to four months. It does not fill, lift, or improve the quality of the skin.
Dr. Schwarz, MD · Board-certified dermatologistLast reviewed September 8, 2026
16:9 hero for Botox (Botulinum Toxin). Never cropped: the tone strip and the corner logo depend on the full frame.

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Botox softens the lines your muscles make when you move — the frown lines between the brows, the crow's feet, the lines across the forehead. It does very little for a line that is fully etched in when your face is still, and nothing for lost volume, sun damage or texture. It is a rental, not a purchase: it fades at around three to four months, and stopping puts you back where you started, not somewhere worse. Dose is the whole conversation — which muscles, how many units, and what you want your face to still be able to do — and who holds the syringe matters far more than which brand is in the vial.

— Dr. Schwarz, Board Certified Dermatologist

Key Facts

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Also calledBotulinum toxin type A, neuromodulator, wrinkle relaxer, "tox". Brands include Botox, Dysport, Xeomin, Jeuveau and Daxxify
DowntimeNone. Small raised bumps for 15 to 30 minutes, and bruising in some people for a few days
SessionsRepeated every 3 to 4 months for as long as you want the effect
Typical costPriced per unit or per area. Roughly $10 to $20 per unit in the US, or about $300 to $600 for one area. Varies widely by city and injector
Results timelineMovement starts to change at 3 to 5 days, full effect at 10 to 14 days
PainA brief sting of a few seconds per injection. Most people do not need numbing
Skin tone safetyThe medicine itself carries no pigment risk. Bruising can leave a temporary dark mark on deeper skin tones
ReversibleNo. There is no antidote. An unwanted effect has to wear off

What It Is

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Botulinum toxin is a purified protein made by the bacterium Clostridium botulinum. In the tiny doses used in medicine it is injected into a chosen muscle to weaken it for a few months. A large, uncontrolled dose causes botulism, which is why it is dosed in units and why who injects it matters. For cosmetic use in the US the FDA has cleared it for frown lines between the brows, crow's feet, forehead lines, and the vertical neck bands. Many common uses are off-label: a lifted brow, the lip flip, chin dimpling, the jaw muscle, and heavy sweating of the underarms, palms and scalp. It also treats chronic migraine, muscle spasm, and some eye and bladder conditions. Brands differ slightly in onset and spread, and their units are not interchangeable — 20 units of one is not 20 units of another. Ask which product and how many of its units you get, and keep a note, because that number makes the next appointment repeatable.

How It Works

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A nerve tells a muscle to contract by releasing acetylcholine where it meets the muscle. Botulinum toxin blocks that release, so the muscle contracts far less.

The effect is not permanent. Over roughly three to four months the nerve grows new endings and normal signaling returns, which is why it has to be repeated. Nothing accumulates, and the muscle is not damaged.

Because it works on movement, it works best on lines that only appear when you move. A line already carved in at rest may soften over months once the skin stops folding a thousand times a day, but slowly and partly. Sun damage, thin skin, lost fat and loose skin are separate problems this does not touch.

What It Treats

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No strong evidence for any condition.

Pros and Cons

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Pros
  • Predictable Same dose, same muscle, same result.
  • Fast and no downtime Ten minutes in the chair, then back to work.
  • Temporary in a useful way Gone in 3 months if you do not like it.
  • A long safety record In medical use since the 1980s, at far higher doses.
Cons
  • It is ongoing Three or four sessions a year, forever.
  • A poor result cannot be undone No antidote. A heavy brow waits out weeks.
  • It does one job Nothing for volume, texture, pores, redness or loose skin.
  • Injector-dependent Dose and placement matter more than the brand.

How to Prepare

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2 weeks beforeA few days beforeOn the day
Plan the timing
2 weeks before
Book at least 2 weeks before anything you care about. The result is not complete until day ten to fourteen, and a bruise takes a week to fade.
Bruising and alcohol
A few days before
Fish oil, vitamin E and ibuprofen add to bruising — skip them for a few days, and alcohol for about 24 hours. Never stop a prescribed blood thinner on your own.
What to bring
On the day
A clean face, photos if you have a specific concern, and an idea of what you want to keep, not just what you want gone.

What Happens

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ArrivingThe treatmentLeaving
Arriving
You say what bothers you while the injector watches your face move. Photographs are usually taken, and brow position and muscle strength checked, because the same lines need different doses in different faces. Numbing is usually skipped since the needle is very fine. Your provider will ask about these things.
The treatment
The skin is cleaned, then small injections go into the chosen muscles, a few in each area. The visit runs 10 to 20 minutes. Each point is a sharp sting, then it is over — most people rate it below a blood test. The forehead and between the brows are the most sensitive.
Leaving
Small raised bumps like insect bites settle within about 20 to 30 minutes. Keep makeup off until they do. Nothing has changed in the mirror yet, and will not for several days.

Recovery

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Days 1 to 3Days 3 to 5Days 10 to 14
Days 1 to 3
A few people bruise, usually near the eyes. Concealer is fine once skin is intact. A mild headache in the first days is common.
Days 3 to 5
Movement feels different — heavy, or a muscle that will not quite fire. Lines start to soften.
Days 10 to 14
The true result. Judge it now, not before. If something is uneven or heavier than you wanted, go back at this point — small adjustments are easy now and pointless later.

Aftercare

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30 minutes4 hours24 hours
Makeup
30 minutes
Once the bumps settle, usually 30 minutes.
Staying upright
4 hours
Stay upright for about 4 hours.
Pressure and exercise
24 hours
No facials, face massage or firm rubbing, and no sleeping face-down the first night. Skip heavy exercise and alcohol for the day.
Why these rules
Precautions rather than proven requirements. The worry is the medicine spreading a few millimeters, and since that costs weeks of a heavy brow, the caution is cheap.

Risks

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Most side effects come from the needle rather than the medicine — bumps, bruises, a headache for a day or two. The ones that matter come from the medicine reaching a muscle a few millimeters from the target. Those are uncommon and cannot be reversed; there is no antidote, so they wear off over weeks.

A droopy upper eyelid
The lid sits lower and the eye looks smaller or tired, because the medicine reached the muscle that lifts the lid. Uncommon, settles over about 3 to 6 weeks, and prescription eye drops help a little meanwhile.
A heavy or dropped brow
Different from a droopy lid — this comes from relaxing the forehead muscle that holds the brow up. It looks tired and hooded and takes weeks to lift, and is more likely if you already use your forehead to hold your brows up.
Unevenness
One brow higher, or a smile pulling differently on one side. Often correctable with a few extra units once the result has settled at two weeks.
A headache or a flu-like day or two
Common early and self-limiting.
A lump or bruise that is not settling
Worth a look rather than a wait.
Dry, gritty eyes or double vision
Report it, particularly after crow's feet or brow treatment.

In Deeper Skin Tones

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The medicine itself carries no extra risk on deeper skin tones. It does not burn, peel or injure the skin, so the pigment problems that follow lasers and stronger peels do not apply here.

The needle is the exception. Bruising and inflammation can leave post-inflammatory hyperpigmentation, a flat dark mark left after the skin has healed. It fades on its own over weeks to months, and it is more likely on deeper skin tones. Preventing bruises is the whole strategy: no alcohol the day before, no fish oil or ibuprofen for a few days if your doctor agrees, ice before and after, and tell the injector if you bruise easily so they can use a finer needle and press after each point. Daily sunscreen on any mark keeps it from darkening further.

Brow shape and how much movement people want vary a great deal, and there is no single face this treatment should be aiming at. A good injector asks what you want your face to keep doing before picking a dose.

If You Stop

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Nothing bad happens when you stop. The effect fades over weeks, the muscles work normally again, and your face returns to how it would have looked anyway. Lines do not come back deeper as punishment, and there is no withdrawal.

What surprises people is the speed. Movement gone for months returns over a few weeks, so the change is more noticeable than the slow drift of aging. That is a comparison effect, not damage.

After years of treatment some people find their lines return a little less deep, because the skin spent that time being folded less. The change is small.

Combining Treatments

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Same day
Home skincare
Retinoids, acids and sunscreen are unaffected.
Same day
Filler
Often done at the same visit, toxin first.
Same day
Chemical peels
They treat the skin surface, which this does not touch.
Wait 24 hours
Facials, massage, needling
Most providers avoid these on the area for at least 24 hours.
Wait 2 weeks
Lasers and radiofrequency
Many wait about 2 weeks either side on the same area.
Wait 3 months
Another Botox session
At least 3 months unless your injector has a reason to go sooner.

Insurance Coverage

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Insurance does not cover cosmetic use. It does sometimes cover botulinum toxin for chronic migraine, severe underarm sweating that has failed other treatment, muscle spasm and some bladder problems, usually after a documented trial of other options.

Ask Your Doctor

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If you are pregnant or breastfeeding
Ask the doctor managing your pregnancy or breastfeeding.
If you have a nerve or muscle condition
Myasthenia gravis, Lambert-Eaton syndrome, ALS and similar conditions make the effect stronger and more widespread. Get a neurologist's opinion first.
If you take certain antibiotics
Aminoglycosides and other medicines affecting muscle signaling increase the effect. List everything you take.
If you take a blood thinner
You will bruise more. Do not stop it on your own — tell the injector.
If you had a droopy eyelid or brow
After a previous treatment, say which product and dose. It changes where the next injections go.
If you have had a poor result before
Including one that wore off unusually fast. Bring the details — it may point to under-dosing, a different product, or antibodies.
If you have had recent facial surgery
Including a brow lift. Anatomy and balance change, and dosing changes with them.
If you have an infection or cold sore
Including an inflamed spot at the injection site. Wait until it clears.
If your main concern is loose skin
Or hollowness, or lines there when your face is still. Likely the wrong treatment, and worth saying before you pay.
If you have any eye condition
A droopy eyelid, dry eye disease, or past eye surgery. Say so before crow's feet or brow treatment.

At-Home Versions

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Daily sunscreen, SPF 30 or higher
Good alternative
Does not touch movement lines, but it is the single thing that most changes how skin ages. Anyone paying for injections and skipping this has the order wrong.
Topical retinoid, over the counter or prescription
Good alternative
Improves fine lines, texture and pigment over three to six months of nightly use. It works on the skin, not the muscle, so it is a companion rather than a substitute.
Silicone or hydrocolloid patches worn overnight
Okay alternative
Physically hold the skin flat while you sleep. There is some support for the idea, mostly short-term, and any change is temporary and modest.
Peptide creams marketed as needle-free relaxers
Okay alternative
Sold on the promise of the same mechanism through the skin. The molecules are too large to reach the nerve ending in a meaningful amount, and the measured effects are small.
Botulinum toxin bought online or injected by an untrained person
Bad alternative
Dose and placement are the entire treatment, and the product supply outside medical channels has caused real harm, including hospital admissions from counterfeit product.

How It Compares

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Gloved hands steadying a reclining woman's face while a fine syringe is placed near her cheekbone16:9 hero for Dermal Fillers. Never cropped: the tone strip and the corner logo depend on the full frame.
Dermal filler
Different job
For a different problem. Adds volume where fat and bone have been lost, and softens folds that are there at rest. It does nothing to movement lines, which is why the two are often used together rather than chosen between.
Topical retinoid
Different job
On a different target. Improves skin quality, fine surface lines and pigment over months of daily use, for a fraction of the cost. It has no effect on the muscles, so it will not change a frown line.
Fractional laser resurfacing
Different job
For texture and etched lines. It rebuilds the skin rather than relaxing the muscle, so it reaches lines that are visible at rest. More cost, real downtime, and more care needed on deeper skin tones.
Surgical brow lift
Different job
Permanent. For a heavy, dropped brow, surgery does what an injection cannot. It is surgery, with the recovery and the irreversibility that implies.
Needle-free peptide creams
Worse
Sold as an alternative to injections, they cannot reach the nerve endings that matter from the skin surface. Some improve the look of fine lines by hydrating, which is not the same mechanism.

Finding a Provider

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Who may inject depends on the state. In much of the US it may be a physician, physician assistant or nurse practitioner, and in many states a registered nurse under a physician's supervision. Those rules describe supervision, not skill, so ask about experience: how often they inject, how they would handle a droopy lid, and whether you can see photographs of their own patients rather than the manufacturer's.

Ask which product, how many units of it you are getting, and get those numbers in writing. Ask when the vial was reconstituted, since the product is a powder mixed with saline. Ask who you call at the weekend if something looks wrong, and confirm a physician is involved in the practice.

Red flags: pricing far below the market, which usually means heavy dilution or product from outside normal channels. A vial you are never shown, or a syringe drawn up out of sight. Unlabeled containers, or labels not in English in a US clinic. Injections at a party, salon, hotel room or someone's home. No medical history and no consent form. An injector who will not tell you the units, or says the number does not matter. Pressure to treat more areas than you came for. Counterfeit botulinum toxin has caused serious illness, and it reaches patients through exactly these settings.

Myths

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  • "It freezes your face." A dose and placement decision, not a property of the drug. A lower dose softens movement and leaves expression. The frozen look is a choice someone made, sometimes badly.
  • "Once you start, you can never stop." It wears off and your face returns to baseline. Lines do not come back worse. What changes is the comparison.
  • "It builds up in your body over time." It does not accumulate. Each dose is broken down and cleared, and the nerve endings regenerate. Very frequent, large doses can build antibodies, which make it stop working rather than cause harm.
  • "Botox and filler are the same thing." Unrelated. This relaxes muscle and fades in months. Filler is a gel that adds volume and lasts six months to two years.
  • "Starting young stops wrinkles from ever forming." Reasonable in theory, lightly supported at best. Treating movement lines early may slow how deeply they etch in, but that is thin evidence for a long commitment.
  • "It is a poison, so it cannot be safe." Dose separates a poison from a medicine. The cosmetic dose is a tiny fraction of a harmful one, and neurology has used far larger doses for decades.

Questions Patients Ask

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How long does it last?

Three to four months for most people and areas. The jaw muscle and underarm sweating last longer. Fading is gradual, so movement returns over a few weeks.

Does it hurt?

A sharp sting for a second or two per injection, several times. Most people find it easier than expected and skip numbing.

Will I look frozen?

Only if the dose says so. Amount and placement decide how much movement you keep, and a lighter dose at a first appointment is reasonable. You can add more at two weeks; you cannot take any away.

What if I do not like the result?

There is no antidote, so it has to wear off over weeks to a few months. Some problems can be balanced with a few extra units elsewhere, which is why starting conservatively is safer.

Is it safe long-term?

Decades of medical use at doses far larger than cosmetic ones, with no pattern of lasting harm. The main reported change is treated muscles getting somewhat weaker over years, which is the intended effect.

How many units do I need?

That depends on the muscle and the face, not a standard number. As a rough reference, frown lines between the brows are commonly treated with about 20 units of one common brand. Units are not comparable between brands, so ask which product is used.

References

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