Reviewed by Dr. Caio Trentin, MD ·
Where the 11s come from
The glabella is the patch of skin between your brows, just above the nose. Beneath it sits a small set of muscles — chiefly the corrugators and the procerus — that pull the brows inward and down. Every frown, squint, and look of concentration fires them. Over years, repeated folding etches vertical lines into the overlying skin. Early on these are dynamic: visible only in motion. With time they settle into static lines that show even at rest. A neuromodulator works upstream of the skin. It does not fill the crease; it quiets the muscle creating it, so the skin stops folding along that line and has room to smooth. Dynamic 11s tend to respond well. Deeper static lines soften but may not vanish, and the realistic outcome for your skin is something Dr. Trentin discusses at consultation.
How a neuromodulator treats them
FORMA uses Xeomin, a purified neuromodulator. Treatment is a few small injections placed into the glabellar muscles. There is no incision and no sedation. Most people describe brief, minor pinches. The visit itself is short. Onset is gradual — the effect builds over several days as the muscle relaxes rather than appearing instantly, and the full result settles in within roughly two weeks. The effect is temporary by design. Movement returns over the following months, which is what allows the result to be adjusted over time rather than locked in. The number of units and the exact injection points are not fixed numbers off a chart — they are matched to your muscle strength, your anatomy, and the look you want to keep.
Dosing for movement, not paralysis
A frozen brow is an avoidable result. It comes from over-treating the glabella or treating it in isolation without reading how the surrounding muscles compensate. FORMA's approach is the opposite: place the smallest effective dose to soften the 11s while preserving natural brow movement and a normal range of expression. Conservative dosing has a second advantage — it is easy to build on and hard to over-correct. If the lines need a little more softening after your two-week mark, more can be added. Starting heavy cannot be undone; you wait for it to wear off. For first-time patients especially, FORMA starts measured. The goal is that you still look like yourself, expressing normally, with the deep furrow eased rather than erased.
What a physician-performed visit changes
The glabella sits close to structures that matter. Injected too low or too far to the side, a neuromodulator can affect muscles that hold the brow or eyelid in position — which is how a heavy brow or a drooping lid happens. Accurate placement is a clinical skill, not a cosmetic one. At FORMA, every consultation and every injection is performed by Dr. Caio Trentin personally — not handed to a delegated injector. He assesses your facial anatomy, asks how you want to look in motion, and treats accordingly. Because he is a physician, he also evaluates whether a neuromodulator is the right tool at all. Some glabellar concerns are better addressed with a different approach, or with a combination, and that is a medical judgment made before anything is injected.
Is it right for you
Neuromodulators for the 11s suit people bothered by the vertical lines between the brows, whether those lines appear only in motion or have begun to linger at rest. They are not appropriate for everyone — certain medical histories, pregnancy and breastfeeding, and some neuromuscular conditions are reasons to wait or choose another path. The honest answer for your face depends on your muscles, your skin, and your goals, and it is determined at consultation rather than assumed. If the furrow between your brows is making you look tense or tired when you do not feel that way, book a consultation with Dr. Trentin. He will examine the area, explain what a conservative result would realistically look like for you, and recommend a plan only if it fits.
Questions
Will treating my 11s make my whole face look frozen?
No, when it is dosed correctly. FORMA treats only the glabellar muscles responsible for the vertical lines and uses the smallest effective dose, so your brows still move and your expression stays natural. A frozen look comes from over-treatment, which conservative dosing is specifically designed to avoid.
How long before I see results, and how long do they last?
The effect builds gradually over several days and settles within about two weeks — it does not appear instantly. The result is temporary and movement returns over the following months. Your individual timeline is reviewed at consultation.
Can deep, set-in 11s be fully erased?
Lines that show only when you frown usually respond well. Deeper lines that are visible at rest typically soften rather than disappear completely, and sometimes pair better with an additional approach. Dr. Trentin will give you a realistic picture for your skin in person.