You do not need to prick the skin or wrap them in foil, but I do suggest that you place them on a cookie sheet with a rack in it to catch the very sticky liquid that will seep from the sweet potatoes as they bake.
Garbage, chemicals, fertilizers, human and animal waste, and other toxic substances are dumped into bodies of water, seep into ground water supplies, or are deposited by the fall of acid rain.
Normally caused by allergic reactions to skincare products or topical expsoure to irritants, dermatitis is usually a localized rash that produces small boil like blisters that may seep fluid.
These waxes can only handle a small amount of fragrance oil, and if you try to add more, the oil will seep out from the sides of your finished candle, causing a greasy mess.
Contact dermatitis is an allergic reaction to something that irritates the skin and is manifested by one or more lines of red, swollen, blistered skin that may itch or seep.