Q. What is Discoid Eczema?

Discoid eczema is a form of dermatitis. It is also known as discoid dermatitis, gravitational eczema, nummular dermatitis, and nummular eczema. It is a long-term, chronic, recurring condition. Typically a rash appears on the skin. It takes the form of red coin-shaped discs or ovals - plaques of eczema - which can affect different parts of the body, usually the lower legs, hands and forearms, and sometimes the back and trunk areas. It is very uncomfortable and itchy. Dermatitis is a generic term meaning "inflammation of the skin".

The round or oval plaques, made of tiny raised red spots and skin scales on a red base, usually have well-defined edges. Affected areas of skin can range in size from just a small fraction of an inch to an inch or more.

Discoid eczema is not contagious - you cannot catch it by touching an affected person, or being near them. Experts say there is no link between food allergies and the condition. It is solely a dermatological (skin) condition; no other systems are affected. Although infection is common, it is secondary, is a result of the discoid exzema, does not cause it. Persons with discoid eczema are at risk of developing other forms of dermatitis.

It is also known as nummular eczema, this from the Latin word nummus, meaning "coin".

Medical practitioners report that discoid eczema is more frequently reported during the winter months, when indoor humidity levels are lower. Although discoid eczema symptoms may show up at any age, they are more commonly seen in males in their 60s and 70s. There is also a smaller peak during the teen years to mid 20s. Discoid eczema is extremely rare in children.

According to the National Health Service (NHS), of the UK, approximately 2 in every 1,000 people are affected.