Key Takeaways:
- Smile lines, also called nasolabial folds, are natural creases that run from the sides of the nose to the corners of the mouth. They are associated with changes in collagen, volume in the cheeks, and skin elasticity over time, rather than simply from smiling.
- Prevention is generally focused on slowing progression rather than stopping it entirely. Sun protection, appropriate skincare, and lifestyle factors may influence how quickly smile lines become more noticeable, though they are unlikely to reverse deeper structural changes over time.
- Treatment options depend on what is contributing to the appearance of the lines. Options may be discussed in relation to volume, muscle activity, or skin quality, sometimes as part of a broader plan. A consultation with a medical professional is required to determine what may be appropriate.
At some point, you might notice the lines around your mouth appear more defined than before. They may become more noticeable in photos or certain lighting. Some appear when you smile or speak, while others may remain visible even when your face is at rest.
That raises a common question: are these “smile lines” something you can actually prevent, or are they simply part of normal facial ageing?
The answer isn’t always straightforward. These lines can develop for a range of reasons, and understanding what may be contributing to them can help set more realistic expectations.
In this post, we’ll look at what contributes to smile lines forming over time, how movement-related folds differ from lines that remain when the face is still, what’s realistic when it comes to prevention, and what options are often discussed when skincare alone is no longer sufficient.
What are smile lines?
Smile lines are the creases that run from the sides of your nose down to the corners of your mouth. You might also hear them called nasolabial folds, laugh lines, or melolabial folds. Smile lines are a normal part of facial anatomy and are one of several types of lines that can become more noticeable as the face changes over time. Understanding what wrinkle treatments are in a general sense can help provide context around how these concerns are discussed.
These lines become more noticeable as people move through their thirties and forties, when the skin may begin to lose some of its elasticity and underlying facial structures gradually change. However, they can also be visible earlier depending on bone structure, skin type, and facial movement patterns.
Smile lines are not caused by smiling too much, which is a common misconception. They are generally associated with a combination of factors, including changes in volume, skin elasticity, facial movement, and the natural structure of your face.
If you are unsure whether what you are seeing is smile lines or something else, like deeper folds or sagging, a medical professional can help you identify what is happening on your face.
What causes smile lines to develop over time?
Smile lines do not appear for a single reason. They are usually the result of several factors working together over years.
Collagen and elastin changes are commonly associated with how these lines develop. These proteins help maintain skin firmness and elasticity. As their production changes over time, the skin may become less able to return to its original position, which can make folds around the mouth appear more noticeable.
Volume loss are also often involved. The face contains fat pads beneath the skin that help provide structure. Over time, these may shift or reduce, particularly in the cheek area. When this happens, the skin above may have less support, which can influence how lines around the mouth appear.
Lifestyle factors may also influence how these changes appear over time. Sun exposure is associated with changes in collagen, while smoking has been linked to skin ageing. Sleeping consistently on one side may contribute to repeated skin folding, although the extent of this varies between individuals.
Genetics influence all of this too. Some people are simply born with deeper smile line creases or thinner skin that shows age earlier.
If you are unsure which of these factors is most relevant to your own face, a qualified practitioner can assess what is happening beneath the surface.
Can you prevent smile lines, or are they inevitable?
The honest answer is somewhere in the middle. You cannot stop the ageing process entirely, but you may be able to slow down how quickly smile lines deepen or become noticeable.
Sun protection is widely considered an important factor. UV exposure is associated with changes in collagen and elastin, and consistent use of a broad-spectrum SPF 50+ may help reduce cumulative exposure over time. Applying sunscreen daily, including in winter or on cloudy days, can support overall skin health.
Topical skincare can play a role, though it has limitations. Over-the-counter retinoid-based products are often discussed in relation to skin renewal. Ingredients such as hyaluronic acid and moisturisers may help support surface hydration, which can influence how fine lines appear. These approaches do not address deeper folds associated with structural changes.
Lifestyle habits can also influence how the skin changes over time. Smoking has been associated with skin ageing, and repeated sun exposure without protection may contribute cumulatively. Sleeping on your back rather than your side may reduce repeated skin folding, although evidence for this is limited.
Even with perfect sun protection and a well-structured skincare routine, smile lines may still develop over time for many people. Prevention is generally about delaying progression rather than eliminating it entirely. If you are looking for realistic guidance on what may be appropriate for your skin, a medical professional can help provide context based on your individual concerns.
What treatment options are available for smile lines?
When topical skincare is not sufficient, clinical options may be discussed. The most appropriate approach depends on what is contributing to the appearance of your smile lines and is determined during a consultation.
Adding volume: Smile lines may become more noticeable as the cheeks change over time. Some approaches are discussed in relation to supporting volume in the midface. This may influence how nasolabial folds appear, without directly targeting the folds themselves.
Muscle related-factors: Not all smile lines are linked to volume changes. In some cases, facial movement patterns may influence how deeply the skin folds during expression. Certain approaches are discussed in relation to muscle activity and how it contributes to line formation.
Approaches that support skin quality: Some options focus on the surface characteristics of the skin. These may relate to texture, firmness, and overall skin quality over time. They are generally discussed in the context of fine lines rather than deeper, more established folds.
Combined approaches may be considered. Many individuals explore more than one approach, depending on their concerns. A plan that considers volume, movement, and skin quality together may be appropriate in some cases, depending on individual assessment.
The approaches described above fall under the broader category of clinical wrinkle treatments. It’s important to note that any option requires a consultation with a medical professional to determine suitability.
Professional standards at Luxe Lips
At Luxe Lips, a cosmetic clinic in Melbourne, our care is grounded in medical ethics and clinical responsibility. Every treatment pathway is approached as a medical process, with established health protocols and safety guiding each step.
Across our clinics in Moonee Ponds, Camberwell, and Brighton, our medical professionals carry out a thorough screening process for every person. This includes reviewing medical history, assessing anatomical suitability, and considering psychological readiness. In line with local guidelines, this evaluation helps determine whether a proposed plan aligns with your health.
Medical professionals proceed only when a treatment is clinically appropriate. If a procedure does not align with your anatomy or health profile, we will explain why and discuss what that means for you. The focus is always on clear information and maintaining a clinical environment where safety and ethical standards come first.
Because responses and circumstances vary, a consultation is required to determine suitability before any wrinkle treatment is considered.
Questions we’re often asked about what smiles lines are
There is generally no difference. Smile lines and nasolabial folds refer to the same anatomical feature: the creases that run from the sides of the nose down to the corners of the mouth. The terms are often used interchangeably.
You may also hear them called laugh lines or melolabial folds. All of these describe the same set of lines. The variation in terminology does not indicate different types of wrinkles or different treatment approaches.
If you are unsure what you are seeing on your own face, a consultation with a qualified practitioner can help clarify whether the concern is nasolabial folds or another feature entirely.
Smile lines often become more noticeable in the thirties or forties, as changes in collagen and underlying facial structure begin to occur. The skin may gradually lose some of its elasticity, which can make these creases appear more visible over time.
That said, age is not the only factor. Some people notice smile lines earlier due to genetics, bone structure, or sun exposure. Others may not see them until later.
If you are concerned about how smile lines are developing on your face, speaking with a medical professional can help you understand what is happening and what may be appropriate for your individual circumstances.
Smiling is not considered a primary cause of smile lines forming or becoming more pronounced. This is a common misconception, but it does not fully reflect how facial ageing typically occurs.
Smile lines are generally associated with a combination of factors, including changes in facial volume, collagen, and skin elasticity over time. Repeated facial expressions can contribute to some types of lines, particularly dynamic lines on the forehead or around the eyes. However, nasolabial folds are more closely related to underlying facial structure than surface movement alone.
According to the Victoria Department of Health,, wrinkles are associated with factors such as ageing, sun exposure, and changes in skin elasticity, rather than facial expressions in isolation.
A medical professional can help you understand what may be contributing to the appearance of smile lines in your case.
Volume loss is commonly associated with how smile lines become more noticeable. The face contains fat pads that sit beneath the skin and provide structural support. As these fat pads change position or reduce over time, the skin above may have less underlying support. This can influence how the skin settles around the nasolabial fold area.
This process typically occurs gradually and may be influenced by genetics, lifestyle factors, and broader ageing-related changes. Sun exposure and smoking have also been associated with changes in skin structure.
If you are noticing changes in the midface or around the mouth, a consultation with a medical professional can help determine whether volume-related changes may be contributing and what options may be appropriate.
Topical skincare may have a role in early-stage fine lines, though it has limitations. Retinoid-based products and ingredients such as hyaluronic acid are often discussed in relation to skin quality and hydration, which may influence how fine lines appear. However, these approaches do not address volume-related or structural changes associated with deeper nasolabial folds.
Over-the-counter skincare is generally focused on surface-level concerns and is not intended to address deeper structural changes such as those related to fat pad position or bone structure. According to the Australian Department of Health and Aged Care, products used for cosmetic purposes are regulated differently from therapeutic treatments and are typically limited to surface-level effects.
For more established smile lines, clinical options may be discussed depending on individual assessment. A medical professional can assess your face and explain what may be appropriate based on what is contributing to the changes you are noticing.
