Kidney stones form in the kidneys and are usually composed of calcium oxalate or uric acid, causing severe pain and sometimes requiring surgical removal. Gallstones, forming in the gallbladder, consist of bilirubin, cholesterol, or bile salts and may also necessitate surgery. Prevention includes maintaining a healthy diet and proper hydration. Kidney stones form in the kidneys and are usually composed of calcium oxalate or uric acid, causing severe pain and sometimes requiring surgical removal. Gallstones, forming in the gallbladder, consist of bilirubin, cholesterol, or bile salts and may also necessitate surgery. Prevention includes maintaining a healthy diet and proper hydration. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle