Aveeno Skin Relief Body Wash ($7) is formulated with glycerin, which is a humectant that works like a sponge to help the skin retain moisture and is ideal for a healing tattoo. It also contains colloidal oatmeal, a prebiotic that Dr. Libby said is a favourite of hers. Colloidal oatmeal does wonders for newly tattooed skin because it's made up of compounds like phenols and vitamin E and "it's a natural anti-inflammatory agent that helps soothe and alleviate dryness and itching," Dr. Libby said.