Understand your dermatitis - the different types

What exactly is dermatitis?

"Dermatitis" is Latin for skin inflammation — derm means skin, and itis means inflammation. It’s not a single disease, but an umbrella term for skin conditions that cause inflammation. They all share symptoms such as redness, itching, flaking, or burning — but their causes are very different.

That’s exactly what makes dermatitis confusing: two people can have what appears to be the same rash but need completely different treatments. According to Cleveland Clinic, 15–20% of all people experience some form of dermatitis at some point in their lives. Atopic eczema alone affects up to 25% of all children and 2–3% of adults.

To understand your skin, it’s essential to know the difference between the four most common types. Here’s what you need to know.

The 4 most common types of dermatitis — and what sets them apart

1. Perioral dermatitis — bumps and redness around the mouth

Perioral dermatitis is an inflammatory condition with small red bumps and papules that cluster together — primarily around the mouth, but also around the nose and eyes. A classic distinguishing feature is a clear band along the edge of the lips, which is typically unaffected.

The condition most often affects women between the ages of 20 and 45. According to StatPearls (NIH), using topical corticosteroids on the face is one of the best-documented triggers: the skin initially responds to the cream, but when it is stopped, the rash flares up again — and many end up caught in an unfortunate cycle of dependence. Other known triggers include heavy cosmetics, certain types of toothpaste, and unsuitable skincare practices.

Perioral dermatitis is easily mistaken for acne or rosacea. It isn’t acne — there are no comedones (blackheads). And although it resembles rosacea, rosacea typically affects the creases beside the nose and the cheeks. To learn more specifically about perioral dermatitis, read our complete guide to perioral dermatitis.

2. Seborrhoeic dermatitis — dandruff and greasy redness

Seborrhoeic dermatitis occurs in the skin’s oil-rich areas: the scalp, forehead, eyebrows, creases beside the nose, and ears. You probably know it better as dandruff — but on the face, it causes redness and greasy or dry flakes that don’t go away with an ordinary moisturiser.

The cause is an overgrowth of Malassezia yeast, which naturally lives on everyone’s skin. In some people, it triggers an inflammatory reaction specifically in oil-rich areas. The condition is chronic, but is triggered and worsened by stress, cold weather, hormonal fluctuations, and certain products.

Characteristics: greasy or dry yellowish-white scales, redness in clearly defined areas (eyebrows, sides of the nose, behind the ears), mild itching. Unlike eczema, the skin barrier is rarely severely weakened — it is primarily the balance of the microbiota that is out of control.

3. Atopic dermatitis — eczema with intense itching

Atopic dermatitis, which most people know as eczema, is the most common type. It is closely linked to genetics and the immune system, and many people with atopic eczema also have asthma or hay fever — this is called the atopic triad.

At its core, eczema is about a weakened skin barrier. When the barrier can’t seal properly, moisture escapes and irritants get in. This triggers an immune response that causes inflammation, redness, and the intense itching characteristic of the condition. In children, eczema typically appears in the armpits and behind the knees; in adults, on the hands, neck, and face.

Eczema can’t be cured, but it can be controlled. The key is rebuilding the skin barrier: moisturizing products, gentle cleansers, and avoiding triggers. Read more about what happens when the skin barrier is damaged — and what actually helps.

4. Contact dermatitis — a reaction to something the skin touched

Contact dermatitis occurs when the skin reacts to something it comes into contact with. There are two types. Irritant contact dermatitis is direct damage caused by a substance — soap, cleaning products, perfume, or acid. The skin isn’t allergic; it has simply been worn down over time. Allergic contact dermatitis is a delayed immune reaction to a specific allergen. Nickel, latex, parabens, and perfume are common culprits.

The rash typically appears 24–72 hours after contact and is located exactly where the skin touched the substance. According to StatPearls (NIH), contact dermatitis is very common — up to 20% of children and 15–20% of adults experience it at some point. The diagnosis is made with a patch test by a dermatologist or allergist.

What’s the difference? A quick overview

It can be hard to tell by looking — but three factors often provide a good clue: location, appearance, and what makes it worse.

It's worth noting that you can have more than one type at a time. And facial redness can have even more causes beyond dermatitis — including rosacea and hormonal fluctuations.

Calm for troubled skin — in the evening

CØLM Redness Relieving Cream is formulated with zinc oxide and sulfur — two of the best-documented ingredients for active redness and inflammation in the skin. Use ONLY in the evening.

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What you can do about dermatitis with redness and inflammation

Whatever type of dermatitis you have, one basic rule applies: the simpler your routine, the better. Irritated skin does not need twelve products — it needs calm and the right active ingredients.

Cleanse gently. Use a mild, fragrance-free cleanser that does not strip the skin of its natural oils. Avoid hot water — it further damages the skin barrier. Moisturize immediately after cleansing. Apply moisturizing products while the skin is still slightly damp. Restoring the skin barrier is essential for eczema and contact dermatitis. Avoid corticosteroids on the face. Especially with perioral dermatitis, cortisone cream can make the condition worse over time — even temporary improvement can be a trap.

For active redness and inflammation — especially with perioral dermatitis and rosacea-like reactions — zinc oxide and sulfur are two of the best-documented topical treatments. Zinc oxide soothes inflammation and protects the skin barrier. Sulfur has proven antimicrobial properties and can address underlying factors contributing to dermatitis, including microbial imbalance and Demodex mites.

When should you seek medical help?

Many forms of dermatitis can be managed with the right home care routine and products. But there are situations when you should see your doctor or a dermatologist. Seek help if the rash spreads quickly or is accompanied by facial swelling, if you’ve tried different products without improvement for over 4–6 weeks, if you suspect a contact allergy (patch testing requires a specialist), or if your symptoms significantly affect your sleep and daily life. If there are signs of infection - yellow discharge, warm, intensely red skin, or fever - seek help sooner.

Your dermatologist can make an accurate diagnosis, and in many cases, the right diagnosis is exactly what was missing to find the right solution.

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CØLM Redness Relieving Cream works at night while you sleep. Zinc oxide and sulfur target inflammation and redness — nighttime is the best time to treat active skin inflammation.

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