A
splinter (known as
sliver in
Canada) is a fragment of a larger object (especially
wood), or a
foreign body that penetrates or is purposely injected into a body. The foreign body must be lodged inside tissue to be considered a splinter. Splinters may cause initial pain through ripping of flesh and muscle, infection through bacteria on the foreign object, and severe internal damage through migration to vital organs or bone over time. Splinters commonly consist of
wood, but there are many other types. According to the
American Academy of Family Physicians (AAFP), common types of splinters are glass, plastic, metal, and spines of animals.