The ringworm rash typically appears as a circular ring shape with raised borders expanding outward, according to Mayo Clinic. The ring is sometimes an irregular shape rather than a perfect circle. The borders are sometimes wavy, similar to a snake.
The ringworm rash is often red and itchy, notes MedlinePlus. The rash area is typically scaly with blisters that ooze. The middle may have bumps or scaly skin, but it is often much lighter than the sharp edges of the surrounding border. This creates the appearance of a ring on the skin.
Sometimes the ringworm fungus causes multiple rings on the skin, states Mayo Clinic. The rings can overlap if they develop close to one another.