Definition of Yeast rash

Yeast rash: A slightly raised pink-to-red rash caused by proliferation of yeast, usually in a moist area such as the groin. It is most common in infants, but can also occur on the skin of older children and adults. Treatment is by keeping the affected area clean and dry, and applying topical antifungal medication. Also known as diaper dermatitis, nappy rash.