Medically reviewed by Brian T. Luong, DMD Key Takeaways A gum boil is a painful, swollen bump filled with pus on your ...

Boils and carbuncles are skin infections caused by a bacteria called staphylococcus aureus (commonly referred to as staph). They present as painful pus-filled pockets, which form under the skin and ...

A boil on your butt may be fluid-filled, itchy, or painful. An infected or inflamed hair follicle, called folliculitis, is the main cause of boils. Treatment for boils may include home remedies and ...