Sea urchins may cause<unk> s According to the American Academy of Family Physicians, the most common foreign bodies contracted by people fall into two official classes: biological<unk> s, and nonbiological<unk> s. In the biological class,<unk> s include bone, fish spines, teeth, and wood. In the nonbiological class, common<unk> s contracted are glass, metal, aluminum, fishhooks, pencil graphite, and plastic. Rarely, people may become infected with<unk> s from more unusual sources. Common cases of exotic foreign bodies include sea urchins, insect stings, stingray spines, and even grenade shrapnel.
Splinter
Splint 
Crusaid
Wart
Crutch
Stinger 
Glare 
Kava