What Causes Jowls?

One of the most common questions people ask as they get older is, "Why am I developing jowls?"

Jowls are a natural part of the ageing process and occur when changes beneath the skin alter the shape and definition of the lower face. While many people assume that jowls are simply caused by loose skin, the reality is much more complex.

Ageing affects every layer of the face—including the skin, fat, muscles, ligaments and even the underlying bones. Understanding these changes can help explain why the jawline gradually loses definition over time.

Want to understand the ageing process first? Read “The Science of Skin Ageing”.

What Are Jowls?

Jowls are the areas of tissue that develop along the lower jaw when the skin and underlying soft tissues lose support.

They often appear as:

• Loss of a sharp jawline

• Softening of the lower face

• Fullness beside the chin

• A heavier appearance around the jaw

• Reduced definition between the face and neck

Jowls usually develop gradually over many years and are a normal feature of facial ageing.

Why Do Jowls Develop?

There is no single cause of jowls. Instead, several age-related changes occur simultaneously.

1. Facial Volume Loss

One of the biggest contributors is the gradual loss and redistribution of facial fat.

As we age:

• The cheeks lose volume.

• Fat compartments become smaller.

• Some fat shifts downward.

• The lower face becomes relatively heavier.

This loss of support allows the tissues around the jawline to appear less defined.

Learn more: “Why Facial Volume Changes with Age”

2. Changes in Skin Elasticity

Healthy skin contains collagen and elastin, which provide strength and flexibility.

From our late twenties onwards, collagen production gradually declines.

As collagen and elastin decrease:

• Skin becomes thinner.

• Elasticity reduces.

• Skin is less able to resist gravity.

• The jawline gradually softens.

Related article: “How Collagen Changes as We Age”

3. Ligament Laxity

Small retaining ligaments help support the soft tissues of the face.

Over time, these ligaments gradually stretch.

As their support decreases, tissues descend slightly, contributing to the appearance of jowls.

Because ligament changes occur alongside collagen loss and facial volume loss, clinicians assess all layers of the face rather than focusing on one isolated area.

Read next: “What Happens During a Cosmetic Consultation?”

4. Bone Remodelling

Many people are surprised to learn that our facial skeleton changes with age.

Research has shown that:

• The jawbone gradually loses definition.

• The chin may become less prominent.

• The angle of the jaw changes.

• Structural support for the overlying tissues decreases.

These changes affect the overall shape of the lower face.

5. Repeated Facial Movement

The muscles of facial expression work every day as we smile, speak, laugh and eat.

Although these muscles are essential for normal facial movement, repeated activity combined with natural ageing contributes to changes in facial appearance over time.

Continue reading: “Understanding Facial Muscles and Expression”

6. Sun Exposure

Australia has one of the highest levels of ultraviolet (UV) exposure in the world.

Long-term UV exposure accelerates collagen breakdown and contributes to premature skin ageing.

Daily sunscreen remains one of the simplest and most effective ways to protect your skin.

Related article: “How Daily Sunscreen Helps Protect Your Skin”

7. Genetics

Some people naturally develop jowls earlier than others.

Your genetics influence:

• Skin thickness

• Bone structure

• Facial fat distribution

• Collagen production

• Overall facial anatomy

This explains why ageing differs from one person to another.

At What Age Do Jowls Start?

There is no specific age.

Subtle changes in collagen begin during the late twenties.

Visible changes to the jawline often become more noticeable during the forties and fifties, although some people notice them earlier depending on genetics, sun exposure, lifestyle and facial anatomy.

If you've noticed forehead lines appearing around the same time, this is also a normal part of facial ageing.

Read: “What Causes Forehead Lines?”

Lifestyle Factors That Influence Jowls

Several lifestyle factors may contribute to earlier facial ageing.

These include:

• Smoking

• Excessive sun exposure

• Poor sleep

• Significant weight fluctuations

• Poor nutrition

• Chronic stress

Healthy lifestyle habits support overall skin health but cannot completely prevent natural ageing.

Are Jowls Normal?

Yes.

Nearly everyone develops some degree of jawline softening with age.

The severity varies considerably depending on:

• Genetics

• Skin quality

• Facial structure

• Sun exposure

• Lifestyle

• Overall health

Jowls are a normal part of the ageing process rather than a sign that something is wrong.

Why Clinicians Assess the Whole Face

When assessing concerns about the jawline, clinicians don't simply examine the jowls themselves.

A comprehensive facial assessment includes:

• Facial proportions

• Skin quality

• Volume distribution

• Muscle activity

• Bone structure

• Facial symmetry

• Neck anatomy

Because facial ageing affects multiple layers, understanding the whole face is important when discussing management options.

Find out exactly what clinicians assess in: “What Happens During a Cosmetic Consultation?”

Frequently Asked Questions

Can weight loss cause jowls?

Significant weight loss can reduce facial fat and make existing skin laxity more noticeable in some people. Maintaining a stable, healthy weight generally supports overall facial appearance.

Are jowls caused by gravity?

Gravity plays a role, but it is only one factor. Facial ageing also involves collagen loss, changes in fat compartments, ligament laxity and bone remodelling.

Can skincare prevent jowls?

A consistent skincare routine supports skin health and hydration, but skincare alone cannot prevent the bigger structural changes that contribute to jowl formation.

Why does my jawline look different than it did ten years ago?

Ageing affects the skin, fat, ligaments, muscles and bones. Together, these gradual changes alter the contours and definition of the lower face over time.

Is developing jowls inevitable?

Some degree of change is a normal part of ageing. Healthy lifestyle habits, sun protection and good skincare may help support skin health, but they cannot completely stop the ageing process.

The Bottom Line

Jowls are a normal consequence of facial ageing and reflect changes occurring throughout every layer of the face—not just the skin.

Understanding these changes allows you to make informed decisions about your skin health and helps explain why cosmetic assessments focus on the entire face rather than one isolated concern.

If you're interested in learning more about facial ageing, explore our educational guides below.

Continue Reading

• The Science of Skin Ageing

• Why Facial Volume Changes with Age

• How Collagen Changes as We Age

• Understanding Facial Muscles and Expression

• What Causes Forehead Lines?

• How Daily Sunscreen Helps Protect Your Skin

• What Happens During a Cosmetic Consultation?