Treatment Area Guide
Bunny Lines Botox: Causes, Dose Logic, and Realistic Expectations
Bunny lines are the diagonal wrinkles that appear on either side of the bridge of the nose, most often when smiling, laughing, or scrunching the nose. In aesthetic medicine, the goal of treating them is not to remove all movement, but to soften the appearance of these lines while preserving a natural expression.
Quick Answer
- Bunny lines are diagonal expression lines on the sides of the nose bridge that become visible with smiling or nose scrunching.
- Botulinum toxin can help soften these lines by reducing the activity of the nasalis muscle in a measured way.
- The area is small and delicate, so dose and injection points are individual; candidacy must be assessed during an examination.
Managed and medically reviewed by Dr. Hamza Gemici and Dr. Murat Toktamışoğlu. This content is for general information and does not replace diagnosis, treatment, or personal pricing.
Physician Assessment
Clarify Botox decisions with an examination
This guide gives a safer decision framework; candidacy, area choice, dose logic, and follow-up should be reviewed by a physician.
Editorial Standard
Editorial and medical review team
This guide is prepared in a physician-led workflow. Source review, indication limits, patient safety language, and realistic expectation framing are checked before publication.
Dr. Hamza Gemici
Medical content manager
Dr. Murat Toktamışoğlu
Co-author and medical aesthetics contributor
What Are Bunny Lines?
Bunny lines get their name from the way a rabbit wrinkles its nose. They are diagonal lines that form on the upper sides of the nose, near the bridge, and they typically become more noticeable during animated expressions such as a wide smile.
The main driver is the repeated contraction of the nasalis muscle, which sits along the side of the nose. Over time, lines that initially appear only with movement (dynamic lines) can gradually become visible at rest as well (static lines). This progression differs from person to person and does not happen at the same pace for everyone.
Why Do Bunny Lines Become More Visible?
The visibility of bunny lines is not caused by a single factor. Expression habits, muscle strength, skin quality, and natural age-related changes all play a role. Some people notice them early, while others see them later.
A clinically relevant point is that in some people bunny lines can become more noticeable after botulinum toxin is applied to the forehead or crow feet. When the surrounding muscles are softened, a person may unconsciously recruit the nasalis muscle more during expression. For this reason, when planning forehead and eye-area treatment, the nose bridge is also considered as part of the overall picture.
How Is Botox Assessed in This Area?
The bunny lines area is small, mobile, and closely related to neighboring muscles. Treatment is therefore planned by evaluating each person's expression pattern, muscle strength, and the direction of the lines, rather than by applying a fixed dose. The aim is to soften the lines in a measured way, not to eliminate nose movement entirely.
Injection point selection is especially important here. A poorly planned treatment can unintentionally affect neighboring muscles and lead to temporary unwanted results such as smile asymmetry. This risk is reduced when a physician who understands the anatomy selects the appropriate muscle and dose. In Türkiye, only CE and TİTCK approved botulinum toxin products are expected to be used in suitable clinical conditions by an authorized physician.
Who Is a Good Candidate?
Candidacy is not defined by age or the presence of a line alone. Muscle strength, whether the lines are dynamic or static, the balance created during smiling, prior aesthetic procedures, medications, and the person's expectations are all reviewed together.
If deep static lines dominate or skin quality is the main concern, botulinum toxin alone may not be enough, and a different or combined approach can be discussed. Pregnancy, breastfeeding, a known botulinum toxin allergy, certain neuromuscular conditions, and active infection at the treatment site may make the procedure unsuitable or require postponement.
When Results Start and How Long They Last
Most people begin to notice changes within several days, and the result is usually assessed more meaningfully around 10-14 days. Duration varies with metabolism, muscle strength, dose, treatment area, and individual factors, so a fixed timeframe cannot be promised for everyone.
A review appointment is important to evaluate symmetry and expression balance. Rather than unnecessary frequent retreatment, a follow-up planned according to individual response is a safer approach.
First-Day Aftercare
Aftercare instructions may vary by patient and treatment area. Common guidance includes avoiding pressure or massage on the treated area for the first hours, delaying intense exercise, avoiding excessive heat, and following the clinic schedule for review.
Urgent symptoms such as widespread rash, breathing difficulty, swallowing difficulty, marked muscle weakness, or vision changes require prompt medical evaluation.
Frequently Asked Questions
What are bunny lines?
Bunny lines are the diagonal wrinkles that appear on either side of the bridge of the nose when smiling or scrunching the nose. They are mainly linked to activity of the nasalis muscle.
Is bunny lines Botox permanent?
No. The effect of botulinum toxin is temporary and duration varies from person to person. Any retreatment plan is decided through individual assessment.
Is bunny lines Botox always treated on its own?
Not necessarily. In some people it is assessed alone, and in others it is discussed together with forehead and eye-area planning. The decision is made during examination based on facial anatomy and expression balance.