Have you noticed redness, irritation or sore skin around your mouth, but you’re not sure what’s causing it?

You’re not alone.

One of the questions I get asked regularly is whether someone has perioral dermatitis or angular cheilitis.

The two conditions can look similar at first glance, but they are actually quite different.

I know how confusing skin conditions around the mouth can be because I have experienced perioral dermatitis myself.

During my own skin journey, I spent years learning how important the skin barrier, microbiome and gentle skincare are when your skin becomes reactive.

What I discovered was that when skin is irritated, the answer is not always adding more products. Often, the skin needs less: less irritation, less disruption and more support.

In this article, I’ll explain the difference between angular cheilitis and perioral dermatitis, what causes each condition, the symptoms to look for and how to support the delicate skin around your mouth.

Common skin conditions such as acne, rosacea and eczema are easily identified and recognised in society. However, skin conditions that can occur in the lower half of our face are not as commonly discussed. 

What Is Perioral Dermatitis?

Perioral dermatitis (PD) is an inflammatory skin condition that typically appears around the mouth, nose and sometimes the eyes.

The word “perioral” means around the mouth, which is why many people first notice symptoms developing around their lips.

Perioral dermatitis can sometimes be confused with acne, eczema or an allergic reaction because it can cause redness and small bumps.

Common signs of perioral dermatitis include:

• Small red or skin-coloured bumps
• Redness around the mouth
• Dry or flaky skin
• Burning or stinging sensations
• Increased sensitivity
• Skin that suddenly reacts to products it previously tolerated

Unlike acne, perioral dermatitis usually does not involve blackheads.

Many people with perioral dermatitis find themselves trying multiple acne products, exfoliants or treatments, only to discover their skin becomes even more irritated.

This is because sensitive, reactive skin often needs a different approach.

Think you have perioral dermatitis? You might like to read our Tips, Treatment and the Best Products for Dermatitis on the Face blog.

What Is Angular Cheilitis?

Angular cheilitis is a condition that affects the corners of the mouth.

It occurs when the skin at the edges of the lips becomes irritated, cracked or inflamed.

The corners of the mouth are a particularly vulnerable area because they experience constant movement from:

• Talking
• Eating
• Smiling
• Drinking

When moisture repeatedly collects in the corners of the mouth, the skin can become irritated.

Common signs of angular cheilitis include:

• Cracks or splits at the corners of the mouth
• Redness
• Dryness
• Pain or tenderness
• Flaking
• Bleeding or crusting in more severe cases

Unlike perioral dermatitis, angular cheilitis is specifically focused on the corners of the lips.

Angular Cheilitis vs Perioral Dermatitis: What Is The Difference?

Although both conditions can appear around the mouth, there are some important differences.

Location

Perioral dermatitis usually appears around the mouth, nose and sometimes the eyes.

It may form a pattern of small bumps and redness around the lips, while often leaving a small area directly next to the lip border unaffected.

Angular cheilitis usually develops specifically in the corners of the mouth.

The irritation is focused where the upper and lower lips meet.

Appearance

Perioral dermatitis commonly appears as:

• Small red bumps
• A rash-like appearance
• Redness
• Dry or flaky skin
• Skin sensitivity

Angular cheilitis commonly appears as:

• Cracks in the corners of the mouth
• Splits or fissures
• Sore areas
• Redness
• Dry, broken skin
• Possible bleeding or crusting

Symptoms

Perioral dermatitis symptoms may include:

• Burning
• Itching
• Sensitivity
• Tightness
• Discomfort when applying skincare products

Angular cheilitis symptoms may include:

• Pain when opening your mouth
• Discomfort when eating
• Pain when smiling
• Tender or sore corners of the mouth

Common Causes and Triggers

While the exact cause of each condition can vary, common contributing factors are different.

Perioral dermatitis triggers may include:

• Topical steroid use
• Overuse of skincare products
• Harsh active ingredients
• Skin barrier disruption
• Microbiome imbalance
• Hormonal changes
• Stress
• Irritation from products around the mouth

Angular cheilitis triggers may include:

• Saliva collecting around the mouth
• Repeated moisture exposure
• Dry or cracked lips
• Fungal or bacterial involvement
• Nutritional deficiencies
• Dentures or changes affecting the mouth area

Understanding the difference between these two conditions is important because they require different approaches.

Can You Have Both Angular Cheilitis and Perioral Dermatitis?

Yes, it is possible to experience both conditions at the same time.

When the skin barrier around your mouth is compromised, the area can become more vulnerable to irritation.

For example, someone experiencing perioral dermatitis may also develop cracks around the corners of their mouth due to dryness, sensitivity or irritation.

This is why focusing on the overall health of your skin barrier is so important.

Rather than only looking at individual symptoms, consider the bigger picture:

• Is your skin barrier supported?
• Are you using gentle products?
• Are you introducing too many active ingredients?
• Are your skincare and personal care products working together?

Exfoliative Cheilitis

Exfoliative cheilitis is when the lips crack at the border and there is a continuous state of dryness, scaling and peeling. It is thought to be caused by excessive keratin which is produced in response to a lip or mouth trauma, or even continual lip sucking.

Once again this should not be confused with PD which tends to be on the outer surrounds of the mouth and not on/touching the lips.

Contact Dermatitis

Contact dermatitis is a skin reaction from contact with certain substances in the environment that you may be allergic to. This is a rash around mouth not perioral dermatitis. The three most common types are irritant, allergic and contact urticaria (hives).

• Irritant - These cause direct skin irritation and inflammation. They are the most common cause of contact dermatitis. It can develop very quickly when the skin touches an irritating chemical that breaks through the skin barrier and causes inflammation.
• Allergic - These cause the body's immune system to have an allergic reaction. The body releases defence chemicals that cause skin symptoms that normally take a few days to appear.
• Contact urticaria - also known as hives, is less common. Symptoms, which usually appear immediately after the skin is in contact with the source of irritation, include swelling and redness. These symptoms usually do not last long. In very rare cases, there is a serious risk of an anaphylactic reaction (a severe allergic reaction that causes the throat to swell, chest tightness).

Does your son or daughter suffer from skin issues? You may like to check out our Help for Children Suffering From Dermatitis blog.

Common causes of contact dermatitis:

• The environment (extreme temperature and humidity).
• Allergy-producing chemicals including metals (nickel & cobalt allergy is extremely common among adults and children as well as chromium salts), fragrances (found in cosmetics, perfumes & some foods), Antibacterial ointments such as neomycin and bacitracin and Formaldehyde (a preservative)

How To Support Skin Around The Mouth

When the skin around your mouth becomes irritated, simplifying your routine is often a good place to start.

Simplify Your Skincare Routine

Avoid overwhelming sensitive skin with too many products.

Focus on:

• Gentle cleansing
• Hydration
• Barrier support
• Consistency

Avoid Potential Irritants

During periods of sensitivity, consider avoiding:

• Harsh exfoliants
• Physical scrubs
• Strong active ingredients
• Fragranced products
• Constantly changing skincare routines

Support Your Skin Barrier

The skin barrier plays an important role in helping maintain hydration and protecting your skin from external stressors.

When the barrier is disrupted, skin can become more reactive.

Supporting your skin barrier with gentle, nourishing skincare can help your skin feel more comfortable.

Be Mindful Around Your Mouth

Small daily habits can make a difference.

Consider:

• Avoiding excessive lip licking
• Gently drying the skin around your mouth after eating or drinking
• Avoiding harsh toothpaste residue sitting on your skin
• Keeping skincare routines simple

Why The Skin Barrier Matters

Your skin barrier is your first line of defence.

It helps:

• Maintain hydration
• Protect against environmental stressors
• Support your skin microbiome
• Keep your skin feeling comfortable

When your skin barrier is compromised, your skin may become more sensitive and reactive.

This is why barrier support is at the foundation of AMPERNA®.

We believe healthy-looking skin starts with understanding and supporting your skin - not fighting against it.

My Personal Experience With Perioral Dermatitis

I understand how frustrating it can feel when your skin suddenly changes.

I experienced perioral dermatitis during the early years of building AMPERNA®.

Like many people, I searched for answers and tried different approaches, hoping to find something that would quickly fix my skin.

What I eventually learned was that my skin did not need more.

It needed simplicity.

I focused on:

• Reducing irritation
• Supporting my skin barrier
• Being consistent
• Understanding my skin microbiome

This experience became one of the reasons AMPERNA® exists today.

I wanted to create skincare that supported sensitive, reactive skin and worked with the skin’s natural ecosystem.

My Gentle Routine For Sensitive Skin Around The Mouth

When your skin feels reactive, a simple routine can help provide the support your skin needs.

Step 1: Cleanse

Cleanse with cool water only

Step 2: Support

Pro+ DS Soothing Serum [RESCUE]

A lightweight serum formulated with AMPERNA®’s postbiotic complex to support the skin microbiome and help maintain balanced-looking skin.

Step 3: Moisturise

Lightweight Soothing+ Emulsion [HYDRATE]

A lightweight moisturiser designed to support hydration and skin barrier function.

Step 4: Refresh

Pro+ SOS Daily Facial Spray [SUPACALM]

A refreshing mist designed to support skin comfort throughout the day. This postbiotic spray can be used after cleansing with water too.

Step 5: Protect

Pro+ Bio Soothing Day Mineral CC SPF15

Daily sun protection helps support your skin against environmental stressors.

Remember Your Whole Personal Care Routine Matters

When you are dealing with sensitive skin around your mouth, remember that your entire personal care routine matters.

Your face is not the only area exposed to skincare and haircare ingredients.

Your:

• Shampoo
• Conditioner
• Body wash
• Body lotion

can all come into contact with your skin.

This is why I believe everything in your personal care routine should be flare-friendly and gentle.

Gentle Bodycare For Sensitive Skin

Your body deserves the same level of care as your face.

The AMPERNA® BODY CARE range was created to extend our microbiome-focused approach beyond facial skincare.

Explore:

Hydrating Gentle Wash with Ceramides [CERALACTIC]

A gentle body cleanser designed to cleanse while supporting skin comfort.

Hydrating Gentle Lotion with Ceramides [HYDRALACTIC]

A nourishing body moisturiser designed to support soft, hydrated-looking skin.

Don’t Forget Your Haircare

Your scalp is skin too.

Haircare products can come into contact with your face, neck and shoulders, which is why choosing gentle formulas matters.

The AMPERNA® Haircare range was developed with sensitive scalps and microbiome support in mind.

Explore:

Cleanse & Rebalance Dermal Care Shampoo [DERMACLEANSE]

Strengthen & Protect Dermal Care Conditioner [DERMASTRENGTH]

Final Thoughts

Angular cheilitis and perioral dermatitis can look similar, but understanding the difference is the first step towards supporting your skin.

Throughout my own skin journey, I have learned that sensitive skin does not usually respond well to aggressive routines.

Instead, consistency, barrier support and gentle skincare have become the philosophy behind everything we create at AMPERNA®.

If your skin is feeling irritated around your mouth, remember:

Healthy-looking skin starts with supporting your skin - not fighting against it.

Sources:

https://www.aad.org/public/diseases/a-z/perioral-dermatitis

http://www.pcds.org.uk/clinical-guidance/angular-chelitis

https://dermnetnz.org/topics/exfoliative-cheilitis/