Crow's Feet Botox in Mersin (Outer Eye Lines): How Long Does It Last, When Does It Take Effect?

Botulinum toxin (Botox) treatment for crow's feet softens the fine lines that fan out from the outer corner of the eye when you smile, by relaxing only the outer fibres of the orbicularis oculi muscle around the eye at a low dose. In Mersin the three questions asked most often about this area are: is botulinum toxin alone enough, will my smile stay natural, and how long does it last? In this article we answer them using our clinical approach and scientific sources.

Why Do Crow's Feet Form?

Crow's feet result from thousands of daily contractions of the orbicularis oculi muscle around the eye. The skin around the eyes is the thinnest on the face and has little fat support, so the lines become noticeable earlier here than in other areas. A clinical review likewise states that facial wrinkles form from a combination of thinning of the dermis and repetitive contraction of the muscle beneath (Small, 2026).

A line that appears only when you smile or use facial expression is called dynamic; one that remains when the face is at rest is called static. The same review reports that the results of treatment are more marked in dynamic lines than in static ones.

Who Is It Suited To? When Is Botulinum Toxin Alone Enough?

Crow's feet treatment is considered for people whose lines are most noticeable with expression; if the lines appear only with expression, botulinum toxin alone is often enough. If the lines remain at rest, or hollowing under the eye or dark circles accompany them, the picture is assessed as a whole, because botulinum toxin acts on lines produced by muscle movement and does not correct volume loss or skin quality:

A systematic review of 50 studies reports that under-eye concerns can result from volume loss, pigment changes, vascular prominence and skin laxity and therefore call for an individualised plan; it describes fillers as the foundation for volume loss (Beer et al., 2026). We describe when each option comes into play in our article on eye area treatments. We describe the filler option for the under-eye hollow in detail in our under-eye filler guide.

How Is It Planned? Keeping the Dose Measured for a Natural Smile

In crow's feet treatment only the outer fibres of the muscle are targeted; injections are placed at a safe distance from the bony orbital rim, at a low dose and at a superficial level. The aim is to soften the line without affecting eyelid movement or the liveliness of the gaze.

In this area the dose directly determines how natural the result looks: too much can restrict the lift of the cheek when smiling and make the expression appear artificial. The effect of botulinum toxin cannot be reversed; it only wears off with time, so a measured plan is preferred: starting with a low dose and adding a small top-up at the check-up on day 10–14 if needed is more predictable than giving a high dose in a single session. In Dr. Doğan Uysal's approach the aim is not to leave the face looking frozen but to soften the line while preserving expression.

Planning is done at the consultation: your facial anatomy and expressions are assessed, your expectations are discussed and the dose is set individually.

When Does Crow's Feet Botox Take Effect, and How Long Does It Last?

The effect of botulinum toxin is not instant: the first effects begin in 3–5 days and the full effect appears in 10–14 days. In the crow's feet area, repeat sessions are usually needed every 3–6 months; the average duration of botulinum toxin is 4–6 months and varies from person to person. In the literature, a clinical review reports that the effect takes about 2 weeks to fully develop and lasts about 3–4 months (Small, 2026). A Cochrane review of 65 randomised trials found that botulinum toxin reduced wrinkles within 4 weeks, while the evidence on the duration of effect is limited (Camargo et al., 2021).

Possible Side Effects and Risks of Crow's Feet Botox

Common side effects are temporary: redness, tenderness and small bruises at the injection points, and mild headache in the first days. Less commonly, temporary drooping of the eyelid or brow, asymmetry or a change in expression can occur; these resolve as the effect wears off. Infection and prolonged muscle weakness are rare.

A clinical review also notes that minor bruising and swelling can occur, and that temporary eyelid and eyebrow drooping are technique-dependent and become less frequent as the injector's skill improves (Small, 2026). The Cochrane review concludes that botulinum toxin probably increases the risk of eyelid drooping; however, most of the trials it reviewed addressed the frown area and only 7 addressed crow's feet (Camargo et al., 2021).

It has also been reported that injections around the eye could dry the eye by reducing tear production and increasing tear evaporation, although this effect is still debated (Ho et al., 2019). If you have dry eyes or another eye problem, tell the physician at the consultation. If you notice an unexpected, severe or prolonged symptom (marked drooping of the eyelid, a change in vision, double vision or severe eye pain), contact the clinic without delay.

Who Should Not Have Crow's Feet Botox?

Botulinum toxin is considered for people over 18 whose general health is suitable. In the following situations, treatment is postponed or not carried out:

• Pregnancy and breastfeeding
• Known allergy to botulinum toxin or to any of the product ingredients
• Neuromuscular conditions such as myasthenia gravis
• Active infection or inflammatory skin problem in the treatment area
• Bleeding disorders or regular use of blood thinners (planned with physician assessment)

A clinical review also lists neuromuscular disorders and allergy to product constituents as contraindications (Small, 2026). The decision on suitability is made at an in-person examination, taking into account your medical history and the medications you use.

What to Ask When Choosing a Doctor in Mersin

Because the eye area is a sensitive region, when choosing a doctor and clinic in Mersin you can ask:

• Who performs it: Is the person doing the treatment a medical doctor?
• The product: Is the product approved by the Ministry of Health, and how can its licence be checked?
• The dose: Are the dose and injection areas planned individually at the consultation?
• Follow-up: Is there a follow-up visit to assess the result?

At Dr. Doğan Uysal's clinic, botulinum toxin is performed personally by medical doctor Dr. Doğan Uysal; all procedures are carried out with products approved by the Turkish Ministry of Health, in a sterile environment and with an individualised dose plan. At the first consultation, after the facial analysis, you are given a plan that suits you and clear pricing information; treatments you do not need are not recommended. We explain how to check that a product is licensed in our guide to spotting counterfeit botox, and how to choose a doctor in our article on choosing a Botox doctor and clinic.

Whether botulinum toxin is enough for your crow's feet, and its dose and plan, are decided at an in-person examination; results vary from person to person. You can reach the clinic in Mezitli by phone or WhatsApp at 0538 279 38 33. For all treatments see our botulinum toxin page, for the day-by-day timeline our article on how many days until Botox takes effect, and for other areas our guide to botulinum toxin treatment areas.

Frequently Asked Questions

How long does crow's feet Botox last?

In the crow's feet area repeat sessions are usually needed every 3–6 months; the average duration of botulinum toxin is 4–6 months and varies from person to person.

When does crow's feet Botox start to work?

The first effects begin in 3–5 days and the full effect appears in 10–14 days. Small corrections are made at the follow-up visit if needed.

Does crow's feet Botox affect your smile?

When applied in a measured dose, the naturalness of the smile is preserved. Only the outer fibres of the muscle are targeted; too much dose, however, can restrict the lift of the cheek when smiling and make the expression appear artificial, so the dose is planned individually.

Is Botox alone enough for the lines at the corners of the eyes?

If the lines only appear with expression, botulinum toxin alone is often enough. If the lines remain at rest, or hollowing under the eye or dark circles accompany them, the picture is assessed as a whole and other options may come into consideration.

Is crow's feet Botox suitable for everyone?

No. Treatment is postponed or not carried out under the age of 18, in pregnancy and breastfeeding, with a known allergy to the product ingredients, in neuromuscular conditions such as myasthenia gravis and with an active infection in the treatment area; bleeding disorders or regular use of blood thinners are planned with physician assessment.

What are the side effects of crow's feet Botox?

Common effects are temporary: redness, tenderness, small bruises and mild headache in the first days. Less commonly, temporary drooping of the eyelid or brow, asymmetry or a change in expression can occur; these resolve as the effect wears off. If you notice an unexpected, severe or prolonged symptom, contact the clinic.

What should I do after crow's feet Botox?

It is recommended not to lie down for the first 4 hours, not to massage or press the treated area, and to avoid intense exercise and excessive heat (sauna, steam bath) on the same day. Detailed instructions are shared after the appointment.

Where can I have crow's feet Botox in Mersin?

At Dr. Doğan Uysal's clinic in the Ofisium İş Merkezi in Mezitli, about 10 minutes from Mersin city centre. The treatment is performed by medical doctor Dr. Doğan Uysal; you can book by phone or WhatsApp at 0538 279 38 33.