Ringworm is similar to another illness known as nummular eczema. Doctors frequently refer to nummular eczema as discoid eczema or nummular dermatitis.
Both illnesses generate round or coin-shaped lesions on your skin, which is why they are similar. Lesions are frequently itchy and scaly.
However, ringworm patients typically have fewer ring-like areas than people with nummular eczema. Also, unlike ringworm, nummular eczema usually does not have a clearing (normal-appearing skin) in the middle.