Medically reviewed by Renee Nilan, MD Peritonsillar abscess, also known as quinsy, is a bacterial infection that causes pus ...

Fistulas usually develop when anal glands become infected. Your body creates the fistula as a way to drain pus from the infection. Pus-filled anal abscesses that result from infected anal glands ...

As well as Pain, Pus and Poison, Michael’s recent series include Inside the Human Body, The Story of Science and Blood and Guts: A History of Surgery. He’s also a regular presenter on The One ...