Ringworm (tinea corporis)
When fungus affects the skin of the body, it often produces the round spots of classic ringworm. Sometimes, these spots have an "active" outer border as they slowly grow and advance. It is important to distinguish this rash from other even more common rashes, such as nummular eczema. This condition, and others, may appear similar to ringworm, but they are not fungal and require different treatment.