Botox for Crow's Feet: How Many Units, What It Costs, How Long It Lasts

Crow's feet are commonly treated with roughly 12 to 24 units of Botox for both eyes combined, about half that per side. Set that beside the frown lines, where 15 to 25 units routinely go into an area a fraction of the size, and the contrast says something useful about the muscle involved.

The orbicularis oculi is a thin ring of muscle circling the eye, and the part that produces crow's feet is its outer arc, sitting directly beneath skin among the thinnest on the body. A thin, superficial muscle needs less product to quiet than a dense one buried under heavier tissue, which is the main reason the per side figure stays small.

It is also why the area responds so visibly. The fan at the outer corner of your eye is produced almost entirely by that one muscle contracting, without the opposing push and pull that makes the forehead and glabella such a balancing act. Soften the contraction and the fan flattens.

The complication here is not the muscle. It is what has been happening in the skin above it, and that is what most often separates a delighted patient from a disappointed one.

Before you book anything, work out whether the lines you dislike are dynamic or static. Dynamic lines appear when the muscle contracts and vanish when your face is still. Static lines are readable at rest, when nothing is moving at all.

The difference is anatomical rather than a matter of degree. A dynamic line is skin folding over a contracting muscle. A static line is a crease folded so many times over so many years that the dermis underneath has remodeled around it, the way paper keeps the mark after it is folded and flattened again. Neurotoxin acts on the muscle, not on the dermis.

So someone with purely dynamic crow's feet can expect the fan to be largely gone on movement. Someone with etched static lines will see real softening, because the constant refolding stops and the skin gets a chance to settle, but the crease itself will still be visible at rest. Stacking more product against an etched line buys a stiffer smile, not smoother skin.

Most people arrive with some of each. An honest plan treats the dynamic component with neurotoxin and routes the static component to something that works on skin quality. The table sorts these concerns into the ones neurotoxin owns and the ones it does not.

The most common complaint about an over treated outer eye is not that a line came back. It is that the smile stopped looking like the patient's own.

The orbicularis oculi is the muscle that narrows the eye and creases the outer corner when a smile is genuine, and that movement is much of how other people read warmth in a face. Flatten it completely and the mouth smiles while the eyes stay wide and still, which registers as slightly blank even when no single feature looks wrong.

Experienced injectors leave some movement in this area on purpose. That is a deliberate clinical choice rather than an under dose, and a little creasing when you laugh is very often exactly what the plan intended.

Say out loud at your consultation how much movement you want to keep. Wanting the fan fully flattened and wanting it softened while your smile still creases are two different plans, and the request is far easier to honor before treatment than afterward, since nothing reverses a neuromodulator.

The fan often continues downward toward the upper cheek, and patients reasonably ask why the injector stops short of the lines that bother them most.

The reason is what sits just past that border. The zygomatic muscles that lift the corner of the mouth run up into the cheek near the lower end of the fan. Product placed too low, or in a volume that lets it spread further than intended, can reach them. The consequence is a weakened or uneven smile on that side.

It wears off like any other neuromodulator effect, but it can last much of the cycle and there is no way to speed it up. That asymmetry is far more noticeable in daily life than a few remaining lines would have been, which is the trade your injector is managing when they keep the lowest injection point conservative.

It is also why placement here stays superficial and toward the outside, and why the amount per injection point matters as much as the total. If those lower lines are your main concern, the useful question is whether they are dynamic or etched, because an etched lower fan was never a neurotoxin problem to begin with.

Patients often ask whether the lines and shadowing directly under the eye can be treated at the same visit, as an extension of the crow's feet. It is a reasonable assumption and usually wrong.

The same ring of muscle continues under the lower lid, but there it is doing structural work. It holds the lid against the eye, supports the blink, and contributes to drainage from the surrounding tissue. Weakening that part of the ring can leave the lid looking rounder or more hollow, can make existing puffiness worse, and in some people affects how comfortably the eye closes.

Most of what people dislike under the eye is not muscle at all. It is thin skin, pigment, lost volume in the cheek beneath, fat pads sitting forward, or fluid that settles overnight. None of those respond to a neuromodulator, and treating the muscle in the hope that they will is how the area ends up looking worse.

Some highly experienced injectors do place a very small amount in the lower lid for selected patients. That is a specialist judgment made after examining lid position and tone, not an add on you should expect to be offered, and a reason to book a separate conversation about the under eye.

Crow's feet follow the familiar arc. Movement starts softening around three to five days, the full effect lands near ten to fourteen days, and most people keep a visible result for roughly three to four months.

In practice this area often sits toward the shorter end of that window, for two reasons. The dose is modest by design, so there is less margin before movement becomes noticeable again, and the skin is thin enough that a small return of muscle activity shows as visible lines earlier than it would in a thicker area.

Constant use is the third factor. The outer eye works every time you blink, smile, laugh or squint, far more movement than the forehead sees in a day, and a habit of squinting outdoors keeps the muscle recruited through the whole cycle. Sunglasses are not a treatment, but they do reduce how hard it works.

Judge the result at two weeks rather than four days, and expect your interval to settle over two or three cycles. Letting movement return fully every time means starting from scratch at each visit, while a steady interval produces the gradual softening people tend to notice by the third treatment.

Practices price neuromodulator two ways. Per unit pricing multiplies a rate by the units actually injected, so a modest crow's feet dose costs proportionally less. Per area pricing charges a flat fee for the outer eyes regardless of how many units the area takes.

Because crow's feet are usually treated alongside the frown lines and the forehead, they are very often quoted as one of three upper face areas in a package rather than priced on their own. That bundling is convenient and frequently better value, but it makes two quotes hard to compare. Ask whether the package caps the units it covers, and what happens if your plan calls for more.

Brand matters too, because units are defined per brand and do not convert one to one. A lower rate per unit on a product that needs more units for a comparable result is not a saving. Our guide to per unit versus per area pricing walks through how to normalize two quotes.

One cost point is specific to this area. If a meaningful share of your lines is static, the full plan is neurotoxin plus a skin treatment, and that skin treatment is normally a course rather than one visit, priced separately. Ask for the cost of the whole plan rather than the injectable alone.