The lactic acid in milk serves as a gentle skin exfoliant, while its natural fat content acts as a body moisturizer. Add a gallon of whole milk to a tubful of warm water and soak. It's a great alternative to sugar and salt scrubs, which may be too abrasive for people who suffer from eczema, psoriasis, or sensitive skin. If you prefer a fragranced bath, add 10 to 20 drops of an essential oil such as lavender.