Feeling irritated after a long day in the sun? Draw a lukewarm bath, fill 'er up with plain colloidal (finely ground) oatmeal, and take a relaxing soak to soothe scorched skin and prevent blistering and peeling. Or, like baking soda, oatmeal can be whipped up into a paste and applied topically. In addition to sunburn, oatmeal also works magic on poison ivy rashes, heat rash and mosquito bites.