Blumberg's sign
Clinical sign indicative of peritonitis / From Wikipedia, the free encyclopedia
Blumberg's sign (also referred to as rebound tenderness or Shchetkin–Blumberg's sign) is a clinical sign in which there is pain upon removal of pressure rather than application of pressure to the abdomen. (The latter is referred to simply as abdominal tenderness.) It is indicative of peritonitis. It was named after German surgeon Jacob Moritz Blumberg.[1][2]