Discoid eczema

Symptoms of discoid eczema

Discoid eczema causes distinctive circular or oval patches of eczema. It can affect any part of the body, although it does not usually affect the face or scalp.

When to seek medical advice

See a pharmacist or GP if you think you may have discoid eczema. They can recommend a suitable treatment.

You should also seek medical advice if you think your skin may be infected. You may need to use an antibiotic cream or, in severe cases, take antibiotics as a tablet or capsule.

A GP should be able to make a diagnosis just by examining the affected areas of skin. In some cases they may also ask questions or arrange some tests to rule out other conditions.

A GP may refer you to a doctor who specialises in skin conditions (dermatologist) if they're unsure of the diagnosis or if you need a patch test.

Causes of discoid eczema

The cause of discoid eczema is unknown, although it may happen as a result of having particularly dry skin.

When your skin is very dry it cannot provide an effective barrier against substances that come into contact with it. This could allow a previously harmless substance, such as soap, to irritate your skin.

It's important to look carefully at all the chemicals in cosmetics and toiletries that may have come into contact with your skin. Contact dermatitis, a type of eczema caused by coming into contact with a particular irritant, may have a role in discoid eczema.

Some people with discoid eczema also have a history of atopic eczema, which often happens in people who are prone to asthma and hay fever. However, unlike atopic eczema, discoid eczema does not seem to run in families.

Other possible triggers 

An outbreak of discoid eczema may sometimes be triggered by a minor skin injury, such as an insect bite or a burn.

Some medicines may also be associated with discoid eczema, as patches of eczema can appear in people taking:

• interferon and ribavirin – when they're used together to treat hepatitis C
• tumour necrosis factor-alpha (TNF-alpha) blockers – used to treat some types of arthritis
• statins (cholesterol-lowering medicine) – which can cause dry skin and rashes

Dry environments and cold climates can make discoid eczema worse, and sunny or damp (humid) environments may make your symptoms better.

Treating discoid eczema

Discoid eczema is usually a long-term problem, but medicines are available to help relieve the symptoms and keep the condition under control.

Treatments include:

• emollients – moisturisers applied to the skin to stop it becoming dry
• topical corticosteroids – ointments and creams containing a steroid that are applied to the skin and may relieve severe symptoms
• antihistamines – medicines that can reduce itching

There are also things you can do yourself to help, such as avoiding all the irritating chemicals in soaps, detergents, bubble baths and shower gels.

Additional medicine can be prescribed if your eczema is infected or particularly severe.

Occasionally, areas of skin affected by discoid eczema can be left permanently discoloured after the condition has cleared up.

Find out more about treating discoid eczema.

Other types of eczema 

Eczema is the name for a group of skin conditions that cause dry, irritated skin. Other types of eczema include:

• atopic eczema (also called atopic dermatitis) – the most common type of eczema, it often runs in families and is linked to other conditions such as asthma and hay fever
• contact dermatitis – a type of eczema that happens when the skin comes into contact with a particular substance
• varicose eczema – a type of eczema that usually affects the lower legs and is caused by problems with the flow of blood through the leg veins