Frown Lines (Glabellar Lines): Causes, Treatments, and Prevention

Last Modified: April 4, 2026

Have you noticed vertical lines between your eyebrows becoming more noticeable over time? Perhaps you refer to them as “frown lines,” or maybe they’re known as glabellar lines in the world of dermatology.

Regardless of what you call them, these lines are a common concern for many people. This article explores what causes frown lines, how they can be managed, and what steps may help reduce their appearance over time

What Are Frown Lines?

Frown lines are vertical creases that appear between the eyebrows, resulting from years of muscle contractions in the forehead. While they are also called worry lines, the medical term for them is glabellar lines. These lines are a common facial feature and are often associated with expressions like frowning or squinting. Over time, repeated facial movements along with the natural ageing process can cause these lines to become more noticeable.

Causes of Frown Lines

Frown lines form from a combination of biological and external factors that include:

  • Facial muscle contractions. Repeated frowning or squinting leads to deep frown lines.
  • Ageing. As the skin naturally loses elasticity over time, it becomes more prone to developing wrinkles.
  • Sun exposure without adequate protection. Prolonged ultraviolet (UV) exposure accelerates skin ageing by breaking down collagen and elastin fibres
  • Genetics. Your genes can influence your skin’s structure and resilience as you age.
  • Lifestyle factors. Habits such as smoking, a poor diet, dehydration and chronic stress may contribute to the formation of frown lines.

Types of Frown Lines

The most common type of frown lines is glabellar lines, which are vertical lines between the eyebrows. These lines are what we are going to talk about in this article.

Other types of frown lines include forehead lines and crow’s feet. Forehead lines are horizontal wrinkles that develop across the forehead, while crow’s feet are fine lines that appear at the outer corners of the eyes.

Treatment Options for Frown Lines

There are various treatment options available to help manage frown lines, including non-invasive and surgical procedures. If you’re in Singapore, here are some of the options for frown line treatments:

1. Anti-wrinkle injections

Anti-wrinkle injections work by temporarily relaxing the muscles responsible for frown lines, specifically the procerus and corrugator supercilii muscles. When the neurotoxin is injected into these muscles, it blocks the nerve signals that trigger muscle contractions.

This muscle relaxation can reduce the appearance of frown lines as the skin above gradually smooths. By reducing movement in the treated area, it may also help slow the development of deeper lines over time.

2. Dermal Fillers

Dermal fillers that contain hyaluronic acid (HA) are commonly used to address frown lines by adding volume beneath the skin. These fillers are soft, gel-like substances that retain moisture and support volume in the treated area. When injected around frown lines, HA binds with water molecules in the skin, which may help improve texture and support fullness in the area.

3. Chemical Peels

Chemical peels involve exfoliating the skin’s outer layer, which encourages new skin cell turnover and may enhance skin texture. During the procedure, a chemical solution is applied to the skin, creating controlled micro-injuries that trigger the body’s natural healing response. This process helps remove dead skin cells and may support collagen production. As the outer layer peels away, new skin replaces it, which may improve the appearance of fine lines, including frown lines.

4. Laser Therapy

Laser treatments use focused light energy that may help stimulate collagen production and support skin renewal, which can improve the appearance of frown lines. During the procedure, focused light penetrates the skin, targeting specific layers and generating heat. The heat triggers the body’s natural healing response, which may include new collagen formation. As a result, laser treatments may contribute to smoother-looking skin and a reduction in the appearance of fine lines, including frown lines.

5. Microneedling

Microneedling is a technique that involves creating controlled micro-injuries in the skin using a device with fine needles. The procedure stimulates the body’s natural healing response and may support collagen production, which plays a role in maintaining skin structure and elasticity. As the skin heals, new tissue develops, which may improve texture and reduce the appearance of fine lines, including frown lines.

6. Radiofrequency Treatments

Radiofrequency (RF) treatments use heat energy to target deeper layers of the skin, which may help stimulate collagen production and support skin structure. During the procedure, a device delivers RF energy into the skin, generating heat that can affect collagen fibres and support skin firmness. RF treatments may also contribute to smoother skin texture and improved elasticity, which can help reduce the appearance of fine lines, including frown lines.

7. Surgical Options (Brow Lift, Facelift)

Surgical procedures such as brow lifts and facelifts are sometimes used to address frown lines and other age-related changes. These procedures involve tightening the skin and repositioning underlying tissues.

Brow Lift

A brow lift focuses on the upper part of the face, particularly the area between the eyebrows. Small incisions, often hidden within the hairline, allow the surgeon to lift and reposition tissues and muscles. As the skin is tightened, frown lines may appear less visible. Results can vary depending on factors such as age, skin type, and healing response.

Facelift

A facelift involves tightening skin and underlying tissues across the face, including the forehead and eye area. Excess skin is removed, and the remaining skin is repositioned. This may reduce the appearance of wrinkles and expression lines. By tightening skin and supporting underlying structures, a facelift may enhance overall facial contours and reduce the visibility of frown lines.

How to Prevent Frown Lines

Preventing frown lines involves adopting healthy lifestyle habits, and these include:

  • Using sun protection. Use broad-spectrum sunscreen daily and re-apply it throughout the day to shield your skin from harmful UV rays.
  • Adopting the right skincare routine. Find a skincare routine that is right for your skin type. Consult a dermatologist or aesthetic practitioner, and incorporate products with exfoliants and moisturisers to promote skin renewal.
  • Having healthy lifestyle choices. Maintain a balanced diet, stay hydrated, get enough sleep and avoid smoking to keep your skin healthy.
  • Managing your stress. Take care of your skin by engaging in regular exercise and practising relaxation techniques.
  • Preventative injections. Regular anti-wrinkle injections can delay the appearance of static frown lines. 

When to Seek Professional Help

If your frown lines persist despite adopting preventive measures or using over-the-counter treatments, it may be time to consult a professional. A qualified aesthetic doctor can help assess your needs and recommend suitable frown line treatment options tailored for you.

Conclusion

Frown lines are a natural part of ageing, but understanding their causes and available treatments can help you make informed choices about their management. Combining preventive strategies with professional treatments may reduce the appearance of frown lines and support long-term skin health.

Table of Contents
TABLE OF CONTENTS
author
Dr. Kellyn Shiau

Dr. Kellyn Shiau

medical director

Founder and Medical Director of Lux Medical Aesthetic Clinic, Dr Kellyn Shiau, strongly believes that good skin and appearance empowers and instills confidence. Lux Medical Aesthetic Clinic was created for this main purpose: to create and maintain good skin with natural but beautiful facial enhancements.
Learn more about Dr. Kellyn Shiau