It's summer again—time for this annoying, painful condition to appear, especially in children. How to treat boils? Find out ...

Also known as furuncles, boils are pockets of pus (a creamy, white substance) on the skin caused by bacteria infecting hair follicles. Cysts—noncancerous sacs of fluid, air, pus, or a soft ...

A pimple on your butt could be a boil, which is a hair follicle infection. It could also be keratosis: a skin condition where dead skin cells build up in your hair follicles. Acne on your butt is ...

Though commonly called a “hair follicle test,” this drug test only tests clipped strands of hair, not the follicle located under the scalp. During this test, a small amount of hair is removed ...

The issue arises if it gets into an open oil gland or hair follicle, which can cause an infection, resulting in an inflamed pus-filled boil, says Gaither. There are various risk factors that can ...