Animal Planet - Monsters Inside Me S02E08: Double Agents (2010)

A peace volunteer deals with a leech in his nose, which gives him a strange nosebleed. A nature-loving landscaper gets a severe allergic reaction when he gets multiple bee stings at once and infects himself with the hookworm parasite to relieve his symptoms. A six-year-old girl gets a strange red spot on her foot from having a maggot in her foot.