Prevention Diagnosis Similar issues Summary Ringworm is a common fungal infection, and it usually forms a circular or oval-shaped rash. The fungi responsible for ringworm thrive in hot, moist.

Ringworm causes red, ring-shaped patches on your skin. The red splotches typically have a wavy, wormlike border that’s raised or scaly, explains Dr. Vij. The rash is usually a little itchy (but.