Éblouissant

Éblouissant · Journal

Botox & Dysport · Greenwich Village

Botox for Frown Lines: Softening the '11s' Between the Brows

By the Éblouissant editorial teamUpdated 2026-09-10Éblouissant, Washington Square
Art deco fan with a gold line drawing of a serene face in profile
The short answer

Botox and Dysport are injected into the muscles between the eyebrows to temporarily soften moderate to severe frown lines. These lines, often called the '11s', are caused by repeated frowning or squinting. Results typically appear within 3 to 7 days and last for 3 to 4 months.

Key takeaways

Why Do Frown Lines Form?

Frown lines are the vertical wrinkles that appear between your eyebrows. Many people call them the '11s' because they often form a pair of parallel lines. In medical terms, these are called glabellar lines.

These lines are a type of dynamic wrinkle. This means they are caused by muscle movement. Every time you frown, concentrate, or squint in bright sunlight, the muscles between your eyebrows contract. The main muscles involved are the corrugator and procerus muscles.

Over time, the repeated folding of the skin caused by these muscle contractions leaves a lasting mark. As we age, our skin loses collagen and elastin, making it less able to bounce back. The lines that once only appeared when you frowned can become visible even when your face is relaxed.

How Botulinum Toxin Treats the 11s

Botulinum toxin type A is a purified protein that temporarily reduces muscle activity. When injected into the muscles between the eyebrows, it blocks the nerve signals that tell those muscles to contract.

With the muscles relaxed, the overlying skin is no longer pulled and folded. This allows the frown lines to soften. The goal is to create a smoother, more relaxed appearance without freezing your expressions entirely.

Botox vs. Dysport for Frown Lines

There are several brands of botulinum toxin type A. Botox Cosmetic and Dysport are two of the most common. Frown lines are the one treatment area where both of these products are FDA-approved.

Specifically, both Botox Cosmetic and Dysport are approved for the temporary improvement in the appearance of moderate to severe glabellar lines associated with corrugator and/or procerus muscle activity in adults. By contrast, only Botox Cosmetic is FDA-approved for forehead lines and crow's feet.

There is one notable difference in their FDA approvals for this area. Dysport's approval for glabellar lines specifies adults younger than 65 years of age. Botox Cosmetic's approval for glabellar lines does not state this age cutoff.

What to Expect During Your Visit

A consultation and treatment for frown lines is a quick process, usually taking 15 to 30 minutes.

The visit begins with a discussion of your goals and a review of your medical history. The physician will ask you to make various facial expressions, such as frowning and raising your eyebrows, to observe your muscle movement and the depth of your lines.

The treatment itself involves a few small injections into specific points in the muscles between your eyebrows. Most patients describe the sensation as a quick pinch. No anesthesia is required.

When Will I See Results?

The effects of botulinum toxin are not immediate. It takes time for the protein to bind to the nerve endings and block the signals.

You may start to notice a softening of your frown lines within 3 to 7 days. The results will continue to develop, with the full effect typically visible around two weeks after the treatment.

The results are temporary. The body eventually creates new nerve endings, and muscle activity slowly returns. For most patients, the effects last for 3 to 4 months. To maintain a smooth appearance, repeat treatments are needed.

Safety and Side Effects

Botox and Dysport are generally well-tolerated when administered by a trained medical professional. However, as with any medical procedure, there are potential side effects.

The most common side effects are mild and temporary. These can include redness, swelling, bruising, or pain at the injection site. Some patients may experience a headache.

A less common side effect is eyelid ptosis, which is a temporary drooping of the eyelid. This can happen if the medication spreads to nearby muscles. There is a rare but serious risk that the effect of the botulinum toxin may spread beyond the treatment area and cause symptoms such as muscle weakness, difficulty breathing, or difficulty swallowing. Seek immediate medical attention if you experience any of these serious symptoms.

Certain individuals should not receive botulinum toxin treatments. This includes women who are pregnant or breastfeeding, anyone with an infection at the proposed injection site, and individuals with certain neuromuscular conditions.

Frown Line Treatment at Éblouissant

At Éblouissant, Dr. Pandey takes a personalized approach to aesthetic medicine. During your consultation, she will carefully evaluate your facial anatomy and discuss your specific concerns.

If you are a good candidate for treating frown lines, Dr. Pandey will help you choose between Botox Cosmetic and Dysport based on your muscle strength and the characteristics of your lines. The price of the treatment depends on the areas treated and the amount of product required. This will be confirmed during your consultation.

Common questions

Do the injections for frown lines hurt?

Most patients report only mild discomfort during the injections. It is often described as a quick pinch. The needles used are very fine, and the procedure is usually over in a few minutes.

Will my face look frozen after treating the 11s?

The goal of the treatment is to soften the lines while maintaining natural expression. When administered correctly, you should still be able to show emotion, just without the deep creases between your brows.

Can I return to work right after the treatment?

Yes, most people resume their normal activities immediately. You may have some slight redness or swelling at the injection sites, but this usually fades quickly.

Is there anything I should avoid after my appointment?

You will generally be advised to avoid rubbing or massaging the treated area for a few hours. This helps prevent the medication from spreading to other muscles. Strenuous exercise should also be avoided for the rest of the day.

At Éblouissant

Botox® & Dysport®

See pricing, what to expect, and how to book on our Botox® & Dysport® page.

Related reading

(212) 964-0971Book Now

This article is general information, not medical advice, and does not create a doctor-patient relationship. Individual results vary. If you have a medical emergency, call 911. Medical disclaimer