Thin Lips

Thin lips refer to lips that lack volume, height, or definition. For some, this is a genetic trait. They have always had a slim or tight lip shape. For others, lips gradually thin with age as collagen and fat diminish, and the skin above the lip becomes more etched and compressed.

People often describe their thin lips as:

• “Flat” or lacking pout
• “Disappearing when I smile”
• “Uneven or poorly defined”
• “Lipstick bleeds easily”
• “My top lip is tiny compared to my bottom lip”

Understanding the cause helps determine the best treatment, whether it’s volume restoration, shape balancing, or subtle muscular relaxation.

Thin lips are influenced by a mixture of genetics, ageing, and lifestyle factors. The most common contributors include:

Genetics

Some people naturally have lower fullness in the vermillion (the pink part of the lip).
Common genetic features include:

• A short upper lip
• A flat philtrum
• Minimal cupid’s bow definition
• Tighter lip muscles that pull the lip inwards

Ageing

With age, the lips lose collagen, elastin, and subcutaneous fat. The result is:

• Reduced lip height
• Flattened cupid’s bow
• Downturned mouth corners
• Fine lines around the lip edge
• A “tucked-in” appearance when smiling

Volume Loss in Surrounding Areas

When the chin, jawline, or midface lose support, the lips can appear proportionately thinner.

Repeated Movements

Smoking and pursing can create upper lip lines, making the lips look even thinner.

Dehydration and Skin Quality

Dryness, sun exposure, and poor skincare accelerate thinning by reducing moisture and collagen support.

Dental or Bite Structure

If the teeth sit behind the natural lip position, lips can look smaller or receded.

You cannot change your genetic baseline, but you can slow down age-related thinning and preserve lip volume through good habits and skin health.

Sun Protection

UV exposure is a major cause of collagen breakdown.
A simple SPF lip balm worn daily helps maintain lip plumpness over time.

Hydration & Nutrition

Lips have no oil glands, so they lose moisture faster.

• Drink consistently throughout the day
• Use a hydrating lip balm with hyaluronic acid or ceramides
• Increase antioxidants (berries, leafy greens, omega-3s) to support skin structure

Avoid Excessive Lip Rubbing or Pursing

Repeated muscular activity compresses the lips and accelerates fine lines.

Medical-Grade Skincare Around the Mouth

Using targeted products around the lip area can slow thinning:

• Peptides strengthen skin
• Low-strength retinoids (applied carefully) improve cell turnover and collagen
• Hyaluronic acid serums enhance hydration

These won’t create volume, but they help maintain definition and prevent early collapse.

Home care can improve softness, colour, and smoothness, though it cannot enlarge lip structure. Still, these habits create an overall healthier, fuller-looking lip.

Exfoliation (Gentle Only)

Occasional gentle exfoliation helps improve lip texture, making them look smoother and slightly plumper.

Hydrating Lip Masks

Masks with hyaluronic acid, squalane, or shea butter can make lips look temporarily fuller by hydrating the surface.

Peppermint or Cinnamon Lip Oils

These ingredients create mild vasodilation, offering a short-lived tingling “plumping” effect.

Facial Exercises (with caution)

Traditional “lip plumping exercises” are largely ineffective and can exaggerate expression lines when overdone. Gentle facial mobility work may improve circulation but won’t enlarge lips.

When thin lips are structural, professional aesthetic treatments are the only reliable way to create lasting, natural enhancement.

1. Lip Filler (Hyaluronic Acid Filler)

Lip filler is the gold-standard treatment for thin lips. Using soft, flexible hyaluronic acid filler, the lips can be enhanced in a way that remains natural, balanced, and custom to your facial proportions.

How Lip Filler Works

• Adds subtle volume to the vermillion
• Creates a defined shape and border
• Enhances the cupid’s bow
• Supports the corners of the mouth
• Balances asymmetry
• Provides hydration for a plump, smooth finish

At Dr Hass Clinic, we avoid over-filling or “trendy” shapes. Instead, the technique focuses on compatibility with your natural anatomy, enhancing what is already there rather than creating an artificial look.

Best For

• Naturally thin lips
• Age-related lip collapse
• Loss of shape or definition
• Uneven lip proportions
• Lips that “disappear” when smiling

Longevity

Most results last 9–12 months, depending on metabolism and product choice.

Read our article on whether 0.5ml or 1ml lip filler is best for you.

2. The Lip Flip (Botulinum Toxin)

A lip flip uses tiny amounts of toxin to subtly relax the upper lip muscle. This allows the lip to roll outwards slightly, giving the appearance of more height, not volume.

Ideal For

• People whose upper lip tucks under when they smile
• Those wanting a subtle enhancement without filler
• Individuals with naturally tight, inward-rotated lips

Best Combined With

Lip filler, for a beautifully shaped but natural upper lip.

Longevity

Around 8–12 weeks.

3. Peri-Oral Rejuvenation (Skin & Collagen Treatments)

When thin lips are partly due to ageing around the mouth, such as barcode lines, crepey texture, or sagging, improving the surrounding skin enhances the lips indirectly.

Effective Options Include:

• Skin boosters (hyaluronic acid microinjections for hydration)
• Polynucleotides (improve elasticity and firmness)
• Laser or RF microneedling for deep collagen stimulation

These treatments transform the “frame” around the lips, helping them look naturally fuller.

4. Chin & Jawline Filler (Indirect Lip Enhancement)

Sometimes, lips appear thin because the lower face lacks projection. Subtle chin filler or jawline filler can improve balance and make the lips look proportionately fuller, without touching the lips at all.

It’s worth booking a consultation if:

• Your lips disappear when smiling
• Lipstick bleeds into fine lines
• You’ve always had thin lips and feel they don’t match your face
• Age has caused flattening or loss of definition
• You want subtle, natural enhancement but aren’t sure which treatment is right
• You want to correct asymmetry or old filler

At Dr Hass Clinic, assessments are tailored to your anatomy, expression, proportions, and personal aesthetic goals — ensuring refined, balanced results that never look overdone.

• Thin lips are caused by genetics, ageing, lifestyle, and structural facial features.
• Prevention involves hydration, sun protection, and supporting the skin around the lips.
• Home care improves texture and hydration but doesn’t create real volume.
• Lip filler is the most effective, natural-looking treatment for thin lips.
• Lip flips enhance shape rather than volume.
• Skin boosters and collagen treatments improve the lip “frame,” enhancing lip appearance indirectly.
• A specialist assessment ensures balanced, face-harmonious results.

Thin lips, whether natural or age-related, are highly treatable with today’s advanced techniques.

Subtle, expertly placed filler, combined with supportive treatments where appropriate, can restore youthful shape, definition, and harmony without ever compromising natural expression.

The best results are those that enhance your features, creating balance and confidence without a “done” look.