It was named after German surgeon Jacob Moritz Blumberg.
A positive sign is indicated by presence of pain upon removal of pressure on the abdominal wall.
The sign indicates aggravation of the parietal peritoneum by stretching or moving.
Positive Blumberg's sign is indicative of peritonitis,[3] which can occur in diseases like appendicitis, and may occur in ulcerative colitis with rebound tenderness in the right lower quadrant.
In that sense, a positive Blumberg's sign serves as a tool to supplement clinical diagnosis.