The Suyá also called the Kisedje are a group of indigenous people living in Brazil, at the headwaters of the Xingu River. They have, historically, been best known for an unusual form of body modification which they practice. After marriage, Suyá men often have their lower lip pierced, and have a small wooden disk placed inside. The size of the disk is gradually increased as time goes on, permanently changing the size of the lip.
Like many other tribes in the upper Xingu, the Suyá were devastated by diseases introduced by European explorers in the late 19th and early 20th centuries. After the establishment of the Xingu National Park in the 1960s, and after the introduction of organised medical care into the area, the population of the Suyá grew greatly. They have a population of 330 (in 2010).
Text adapted from Wikipedia’s article on the Suyá people