If you have a sunburn, a soaking bath containing oatmeal powder and two or three tablespoons of white vinegar is soothing, relieves itching and helps the skin regain its normal moisture barrier. The vinegar helps remove inflammatory compounds released by sun-damaged skin and soothes sunburn pain. Aveeno makes oatmeal powder, or you can make your own by grinding uncooked oat cereal in a blender until it becomes a fine powder.