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  3. 6 Types of Eczema–and What You Need to Know About Each

6 Types of Eczema–and What You Need to Know About Each

By Amanda Gardner
November 09, 2018
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Itchy skin? Find out if one of these types of eczema could be causing your symptoms.
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Types of eczema

Here’s what researchers know about the potential causes of this common skin condition.

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Atopic dermatitis

Atopic eczema or atopic dermatitis is the most common form of eczema. The dry, red, scaly skin often shows up on the outer parts of joints like elbows and knees. You might also see cracks behind the ears; a rash on your arms, legs, or cheeks (often caused by scratching the itch); or even open, leaking sores.

Atopic eczema can be triggered by chemicals, stress, temperature changes, and allergens touching the skin.

In people with atopic dermatitis, the skin’s barrier isn’t maintained. “The skin is not holding the fats that it should, and that creates microscopic cracks,” says Dr. Newsom. “It’s like the mortar between the bricks is missing.”

The condition runs in families, and many people with atopic dermatitis also have asthma and hay fever (called the “atopic triad”).

RELATED: 13 Things That May Make Atopic Dermatitis Worse

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Contact dermatitis

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Contact dermatitis is similar to atopic dermatitis in that it happens when the skin touches irritating substances, like nickel or a particular chemical, explains Michele S. Green, MD, a dermatologist with Lenox Hill Hospital in New York City. It can cause redness, burning, swelling, and blisters that can “weep” and then form a crust. Contact dermatitis symptoms tend to show up wherever the skin came into contact with the irritant, which is often the hands. Many people have both contact and atopic eczema.

There are several different subtypes of contact dermatitis; the two most common are irritant contact dermatitis and allergic contact dermatitis.

“Irritant contact dermatitis is something that would irritate anyone if you have a high enough concentration, like bleach or acid or even poison ivy,” says Dr. Newsom. “Allergic contact dermatitis is a true allergy. The immune system is responding as if it’s dangerous when it’s not.”

Possible irritants include fragrances, hair dyes, detergents, tobacco smoke, paint, wool, rubber, leather, certain skincare products (including soap), and allergens (like pet dander).

RELATED: 12 Reasons Your Skin Is So Itchy–and When to Talk to a Doctor

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Dyshidrotic eczema

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Dyshidrotic eczema is characterized by small, itchy blisters that usually show up on the hands and feet and can be quite painful. Again, coming into contact with irritants can cause a flare. Symptoms also often occur during times of stress, when temperatures go up, or if your hands stay wet for too long.

While all forms of eczema can be severe, dyshidrotic eczema can actually be debilitating if blisters on your feet make it hard to walk or hand blisters get in the way of daily tasks or work.

RELATED: How I Deal With Dyshidrotic Eczema, a Skin Condition That Makes It Painful to Walk

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Nummular (or discoid) eczema

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Nummular or discoid eczema is distinct from other types in that it is always round, often described as “coin-shaped.”

“Nummular just refers to the shape of the lesion,” explains Dr. Green. “It’s a round spot.”

It also often itches and can be harder to treat than other types of eczema. Typical triggers include insect bites (that break the skin) or wintertime dryness.

RELATED: The Key Differences Between Eczema and Psoriasis You Need to Know

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Seborrheic dermatitis

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Seborrheic eczema is more commonly known as dandruff when it appears on your scalp (also called “cradle cap” in babies). But it can also show up on other parts of the body where there are sebaceous (oil-producing) glands, like your nose and upper back. Hormones and yeast can aggravate the condition.

Seborrheic dermatitis can make skin red–but it can also cause greasy, swollen patches. It might appear as fine flakes or thicker white or yellow flakes that crust.

“It’s usually not as annoying as some of the other [types of eczema] unless it’s severe,” says Dr. Green. Sometimes anti-dandruff shampoo is enough to control it, though there are stronger prescription shampoos as well.

RELATED: 11 Things People With Eczema Want You to Know

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Stasis dermatitis

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Stasis dermatitis is in a different league than other forms of eczema; it’s really a symptom of deeper problems–literally. In fact, stasis dermatitis is an indicator of circulation and blood-flow problems. In addition to red, itchy, flaky skin, ankles may swell and blisters may develop into ulcers.

“Stasis dermatitis can be a red flag,” says Dr. Green. “You can use creams, but, ultimately, you need to go see a cardiologist or a vascular doctor.”

In some cases, you may need surgery to repair the damaged veins. Support stockings and elevating the legs can help alleviate swelling.

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1 of 7 Types of eczema
2 of 7 Atopic dermatitis
3 of 7 Contact dermatitis
4 of 7 Dyshidrotic eczema
5 of 7 Nummular (or discoid) eczema
6 of 7 Seborrheic dermatitis
7 of 7 Stasis dermatitis

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6 Types of Eczema–and What You Need to Know About Each
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