Botox for frown lines is a neuromodulator injection that relaxes the corrugator supercilii and procerus muscles in the glabella, the area between the eyebrows. This action softens the vertical lines that form there. These lines are nicknamed “11 lines” because the two parallel creases resemble the number 11.
This article covers what causes these lines, how Botox relaxes the muscles behind them, the difference between lines that show only during movement and lines etched in at rest, and what to consider before treatment.
Frown lines between the brows are the vertical creases that form in the glabella, the flat area of skin above the nose and between the eyebrows. They form when the underlying muscles contract. They appear most visibly when a person frowns, squints, or concentrates, and in many people they persist even when the face is at rest.
The medical term for this area is glabella, and lines that form there are often called glabellar lines.
The nickname “11 lines” comes from the visual pattern the two creases form when they run parallel to each other. Frown lines typically appear as one or two vertical lines on each side of the midline. When both sides are visible together, the shape resembles the numeral 11.
Some people develop a single central line, and others develop three or more, but the two-line pattern is the most common source of the name.
The vertical lines between the eyebrows form from repeated contraction of the glabellar muscles over time. Every frown, squint, or moment of concentration pulls the skin between the brows into the same fold. Repeating that motion for years causes the skin to retain a crease even after the muscle relaxes.
Sun exposure and the skin’s natural loss of elasticity can make an existing crease more noticeable, but the underlying cause is muscle movement, not skin damage alone.
Botox relaxes the glabellar muscles by blocking the nerve signals that tell them to contract. Once injected, it interrupts the signal between nerve and muscle, so the muscle contracts less forcefully or stops contracting during the movements that normally form the lines.
Botox is a brand name for botulinum toxin type A, a neuromodulator that a licensed medical professional injects directly into the target muscle. Anne Therese offers the injection through its Botox treatment, matched to an individualized treatment plan rather than applied as a fixed protocol.
As the muscle relaxes, the skin above it is no longer pulled into a fold each time a person frowns, and the vertical lines soften.
The corrugator supercilii and procerus are the two muscles responsible for pulling the eyebrows down and together. The corrugator supercilii runs along each eyebrow toward the midline and pulls the brows inward, and the procerus sits between the eyebrows and pulls them downward.
Working together, these two muscles create the vertical folds between the brows. Because both muscles feed the same crease, a licensed medical professional targets both when addressing 11 lines with Botox.
Dynamic lines appear only during movement, such as frowning or concentrating, and disappear once the face relaxes. Because they depend entirely on muscle contraction, Botox resolves them fully.
Static lines remain visible even when the muscles are still, since years of repeated folding have left a permanent crease in the skin itself. These lines may soften as the muscle relaxes, but the etched crease doesn’t always fully resolve.
Side by side, the two line types differ in when they’re visible and how fully Botox addresses them, summarized below.
Botox treats the muscle contraction that causes the lines, not the skin crease itself. For static lines that are already visible at rest, this means the result is typically a visible softening rather than a full resolution.
A licensed medical professional can evaluate which pattern is present and discuss whether an individualized treatment plan is appropriate. That plan may include a complementary option like dermal filler for the etched-in component.
Treatment starts with a consultation and moves through the injection itself as part of a clinically guided protocol. It is followed by a period where results gradually appear and later fade as muscle activity returns. Here is the general sequence:
Onset and duration are covered in more detail below.
Results from Botox for frown lines do not appear immediately after injection. The neuromodulator needs time to interrupt the nerve-to-muscle signal, so visible softening builds gradually over the days that follow rather than showing up right away.
Botox results are temporary and diminish as the muscle gradually regains normal activity. The treatment relaxes the muscle rather than permanently altering it, so the contraction that causes the lines eventually returns. Maintaining results requires ongoing treatment rather than a single session.
Botox for frown lines is generally suited to people who want to soften the vertical creases between their brows without surgery. Candidacy depends on individual factors that a licensed medical professional evaluates directly.
Relevant factors include the strength and pattern of the glabellar muscles, whether the lines are primarily dynamic or static, overall health history, and treatment goals.
Botox is not positioned as effective or appropriate for every patient. A licensed medical professional determines candidacy through an individualized treatment plan, not a general checklist.
Botox and dermal filler address frown lines through different mechanisms. Botox relaxes the muscle that causes the crease, while dermal filler adds volume beneath the skin to fill it in.
Because Botox works on muscle contraction, it is suited to dynamic lines and to reducing the movement that deepens static ones over time. Dermal filler works directly on the skin and tissue, and it’s sometimes considered for lines that stay visible at rest even after the muscle relaxes.
A licensed medical professional can determine whether one approach or a combination fits a given pattern of lines as part of an individualized treatment plan.
Injectable treatment decisions carry more weight when the practice’s medical leadership has hands-on injection experience. Anne Therese Aesthetic Medicine was founded by Dr. Anne Therese Stubbs, MD, a board-certified physician. She serves on the faculty boards of ZO Skin Health and Galderma and trains physicians nationally in facial injection technique. More about the practice’s approach to injectable care is available on Anne Therese’s story.
No, not when the treatment is dosed to the individual’s muscle pattern. Botox relaxes the targeted muscles rather than stopping movement across the entire face. A licensed medical professional adjusts the treatment plan to the individual’s muscle pattern and expression goals, since overtreatment or under-treatment can affect how natural the result looks. For that reason, a licensed medical professional performs the injection rather than using a fixed protocol.
Botox and Dysport are both neuromodulators that relax muscle contraction through a similar mechanism, but they are distinct, separately formulated products. A licensed medical professional can discuss which option fits a patient’s muscle pattern and treatment goals.
Yes, when an individualized treatment plan calls for it. Botox addresses muscle movement, while dermal filler addresses volume. A licensed medical professional may recommend pairing the two for lines that have both a dynamic and a static component.
Most people resume normal activities right after treatment. A licensed medical professional typically advises avoiding rubbing or pressing on the treated area in the hours immediately following injection.
Botox for frown lines works by relaxing the corrugator and procerus muscles that pull the eyebrows down and together. This softens the vertical creases those muscles create, rather than treating the skin surface alone. Whether a line responds fully or only softens depends on whether it’s dynamic or static. That’s why an individualized treatment plan built around a licensed medical professional’s evaluation matters more than a generic approach.
Ready to find out what to expect for your own pattern of frown lines? Schedule a consultation with Anne Therese Aesthetic Medicine.
