Nummular eczema is also known as nummular eczematous dermatitis, which is used for medical description and discoid eczema, a name derived because the disease appears to be coin-shaped. Studies are inconclusive when it comes to determining the cause or causes of nummular eczema, but there are some causes which might trigger eczema. Some of the factors, acting alone or in grouping with other may cause nummular eczema, if you have dry skin and stay in low humidity environment, and bacterial infections that induce a hypersensitivity reaction in skin. Apart from these two, Isotretinoin a medication used to treat severe acne may also cause it.
Factors that may flare up existing nummular eczema include wool clothing worn next to the skin, topical medications, soaps and detergents, and frequent bathing.
In the first stage tiny red spots appears as a group of tiny red spots and blister-like lesions that increase and merge into a reddened, itchy, sometimes burning coin-shaped lesion two to 10 centimeters in diameter. This lesion forms into a ring that looks like the ring worm infection.
In the start nummular eczema may begin with one or several lesions. In some people these lesions clear up within a year. In other patients the lesions persist or recur for many years; lesions that reoccur after clearing tend to do so at the first point of outbreak. This disorder is most likely to be on the legs, arms and hands, and the torso. The disease is more frequent in men than in women; with a peak age of onset at 55 to 65 years but it can outbreak in younger ages especially in women.
