What are smile lines?
What are smile lines?
The term smile lines is commonly used to describe two types of facial creases:
- Nasolabial folds: These are the deeper lines that run from the sides of the nose to the corners of the mouth
- Accordion lines: These are short, curved vertical lines that radiate outward from the mouth or cheeks when smiling
Both types of lines are caused by repeated facial movement and natural ageing. While they are completely normal, they may become more pronounced over time, especially with volume loss or reduced skin elasticity. Some people choose to leave them as they are, while others seek advice about softening them.

What causes smile lines and accordion lines?
Cause #1 ā Natural facial movement
Smiling, laughing and speaking cause repeated folding in the same areas. As elasticity decreases, these creases can remain visible even when the face is at rest.
Cause #2 ā Volume lossĀ
Mid-face fat and structural support naturally decline with age. This causes the skin to descend, deepening nasolabial folds and revealing accordion lines.
Cause #3 ā Skin laxityĀ
Lower collagen and elastin levels reduce the skinās ability to bounce back, contributing to permanent lines.
Cause #4 ā Genetics
Thinner skin, flatter cheeks, or highly expressive features may increase the likelihood of visible creases.
Cause #5 ā Sun exposure and lifestyleĀ
UV damage, smoking, dehydration, and poor nutrition all speed up collagen breakdown and wrinkle formation.
Why do I have smile lines or accordion lines and others donāt?
Factor #1 ā Facial structure and fat distribution
People with naturally fuller cheeks often have more support for the skin, which can reduce fold depth.
Factor #2 ā Genetics
Inherited traits like skin quality and expression patterns influence how and when lines develop.
Factor #3 ā Ageing and movement
Even those with smooth skin early in life may develop lines over time due to repeated expression and environmental factors.
Factor #4 ā Lifestyle habitsĀ
Chronic sun exposure, poor skincare, stress, and lack of hydration can contribute to the development and deepening of lines.
Living with smile and accordion lines
Smile lines are a normal part of how faces move and age. Some people notice:
- Lines at rest: Over time, creases can stay visible when the face is relaxed.
- Makeup settling: Products may collect in folds.
- Gradual change: Lines often deepen slowly with age and sun exposure.
Some people are not bothered by their smile lines. Others choose to seek advice.
Frequently Asked Questions
Q: What treatment options are there for smile or accordion lines in Australia?
A: The most suitable approach depends on the depth and cause of the lines. Some people may benefit from surgical options, while others may explore non-surgical treatments. A consultation with a qualified healthcare professional will help determine what is appropriate for your individual needs and goals.
Q: Can I prevent accordion lines from forming?
A: Facial movement is a natural part of expression, so lines cannot be completely prevented. You can help slow their development by protecting your skin from UV exposure, maintaining hydration, and using skincare that supports collagen and elasticity. Consistent sun protection and a healthy lifestyle make the biggest difference over time.
Q: Are smile and accordion line treatments safe?
A: All procedures carry some level of risk. A qualified healthcare practitioner will assess your medical history, skin type, and treatment goals to recommend suitable options and explain potential risks and aftercare. Always choose a trained professional working within an accredited clinical environment.
Q: Will I lose my natural expressions?
A: Treatments for lines aim to soften lines while keeping facial movement, but results vary and some treatments can temporarily affect expression. A practitioner will explain what to expect.
Q: Are these treatments covered by Medicare?
A: No. Cosmetic treatments for smile and accordion lines are not covered by Medicare in Australia.

Treatment options and finding a practitioner
Smile lines are a normal part of how faces move and age, and you do not need to treat them. Daily sun protection and good skincare may help slow changes over time.
Some people choose to explore options. A practitioner may discuss options depending on your skin, health history and goals.
Surgical consultations
In Australia, cosmetic surgery must be performed by a registered medical practitioner.
Non-surgical consultations
- Volume loss consultation
- Facial lines consultation
- RF skin needling consultation
- Skin needling consultation
- CO2 laser resurfacing consultation
- Thread lift consultation
In Australia, these must be completed by a qualified doctor, nurse, or dentist.
All treatments carry risks, which can include swelling, bruising, lumps, infection, pigment changes and, rarely, blocked blood vessels or scarring. Surgery also carries risks such as bleeding, nerve injury and anaesthetic risks. A registered practitioner will explain the risks, recovery time and costs at your consultation. Results vary between people.
Please note that specific treatment details cannot be provided here to comply with Australian advertising regulations.
Find a verified practitioner
Every practitioner on Mirror Mirror has had their registration, qualifications, insurance and experience checked. Find a verified practitioner near you.