Puffy eyelids after Botox: why, how long and what to do

Puffy eyelids, or more visible bags under the eyes, are among the eyelid problems after an injection. They occur mainly after treatment of crow’s feet, at the corners of the eyes, and more rarely after treatment of frown lines. It is a known effect, harmless in the vast majority of cases, and temporary. You do, however, need to be able to recognise the rare allergic swelling, which requires quick action. This page answers the seven questions people ask most often.

Why do the eyelids swell after an injection?

Two different mechanisms can be involved.

The first is a local reaction to the procedure. The label of a botulinum toxin points out that injections can be followed by swelling or oedema, redness, bruising, tenderness or a hard lump (induration) at the injection site³. Eyelid skin is thin, so swelling shows easily.

The second is linked to the action of the toxin on the orbicularis muscle, the ring-shaped muscle around the eye that is treated to soften crow’s feet. A review of upper face complications explains that relaxing it can make the small fat pads of the lower eyelid stand out, and that lymph drainage in the area can slow down, causing eyelid swelling⁴. This risk is greater in people whose muscle is already very lax and whose lines extend towards the cheekbone⁴.

The labels confirm this effect. After treatment of crow’s feet, eyelid oedema is common with one type A toxin¹ and uncommon with another². After treatment of frown lines, swelling of the face, eyelid or area around the eye is described as uncommon².

How soon after the injection does it appear?

It depends on the mechanism. Swelling caused by the procedure is a reaction to the injection itself³: it can be seen at the time of the procedure or shortly afterwards, and the label gives no precise timing. Swelling linked to muscle relaxation tends to appear as the effect of the toxin builds up: after treatment of crow’s feet with a type A toxin, improvement of the lines is seen from the first 6 days, with the peak effect around day 30¹.

How long does it last?

Swelling caused by the procedure usually goes down quickly. Swelling linked to muscle relaxation, on the other hand, can last as long as the effect of the toxin persists. For crow’s feet, one type A toxin showed an effect on lines for up to 5 months in trials². None of the sources we consulted gives the specific duration of the swelling, which may fade before the effect on the lines ends. The page on how long botulinum toxin lasts explains durations of effect product by product.

Is it reversible?

Yes. The swelling disappears when the orbicularis muscle regains its strength and lymph drainage returns to normal. Swelling caused by the procedure goes down on its own. No lasting effect is described in the sources we consulted.

Is there a treatment?

No treatment makes the toxin wear off faster. For swelling linked to muscle relaxation, you wait. Simple measures, such as sleeping with your head slightly raised or applying cold compresses in the first few days, are sometimes suggested. Only take a medicine on medical advice.

For future sessions, the doctor can adapt the injection points: the review cited points out that this risk is greater when the eyelid is lax, and recommends assessing this area before treatment⁴.

What should you avoid?

Do not rub or massage your eyelids vigorously. Do not apply non-prescribed creams or products near the eye. Avoid taking an allergy medicine or an anti-inflammatory without medical advice. Do not ask for another injection around the eye to "correct" the swelling: it would relax the muscle further.

When should you see a doctor?

Contact the doctor who performed the injection again if the swelling is significant, if it does not go down, if it makes it hard to open your eye, or if it comes with redness, warmth or increasing pain: a localised infection is among the reactions described after an injection³. An eyelid that droops, rather than swells, is covered on another page. Call emergency services (15 or 112 in France, or your local emergency number) if the swelling is sudden, spreads to the face, lips or throat, or comes with difficulty breathing.

If the eyelid does not look swollen but drooping, see the page on the drooping eyelid after an injection. Swelling often follows treatment of the corner of the eye: the pages on crow’s feet that look overdone and on dry eyes after an injection describe the other possible effects in this area.