The science: While there are no large-scale studies proving that right-side sleeping causes gallbladder attacks, gastroenterologists have observed this phenomenon clinically. Patients with known gallstones often report more frequent symptoms when sleeping on their right side.
Who is most at risk: People with known gallstones (even tiny ones). People with a family history of gallbladder disease. People with a history of gallbladder “attacks” (biliary colic).
What you can do: If you have gallstones and notice pain after sleeping on your right side, try switching to your left side or back. If you have frequent attacks, talk to your doctor about gallbladder removal (cholecystectomy).
3. Potential Impact on Liver Function (Very Rare)
This risk is often overstated online, but here’s the actual science.
What happens: Your liver is a large, heavy organ on your right side. When you lie on your left side, the liver hangs away from the diaphragm. When you lie on your right side, the liver rests against the diaphragm and other abdominal organs.
