Oat is a plant whose seeds (oat), leaves and stem (oat straw), and bran (the outer layer of whole oats) are applied topically. Oats are used for skin conditions including itchiness, dryness, oiliness, weeping eczema, and contact dermatitis. Oats are also applied to the skin for chicken pox, osteoarthritis, liver disorders, and added to foot baths for chronically cold or tired feet.