Medically reviewed by Susan Bard, MD Boils are painful, pus-filled, and are caused by infections like Staphylococcus aureus.Cysts are painless, non-infectious growths filled with keratin or other ...

Boils on your inner thigh usually stem from a staph infection in a hair follicle. Squeezing a boil can spread infection, which leads to more boils and possible complications. Pain relievers and warm ...