To make an oatmeal bath for itching, you can grind 1 cup of raw, unflavored oats into a fine powder using a blender or food processor. Fill the bath with warm water and sprinkle the oats throughout the bathtub. Use your hand to mix the oats into the water until the water is a milky white color. Carefully climb into the tub and soak for 15-30 minutes, or until the water is cooled to room temperature. When you’re finished in the tub, you may want to rinse your body quickly to prevent your skin from becoming sticky. Oatmeal baths are mild enough to be used as often as you like, and they may improve your skin barrier so your skin doesn't feel as dry. If you can't find colloidal oatmeal bath products at your local store, check at the pharmacy. Oatmeal baths are generally safe and mild, but if you experience a rash after getting out of the bath, stop taking them—you might be experiencing contact dermatitis.