Types of Gallstones You Should Know and How They Affect Your Health Gallstones are more common than most people think and many don’t even realize they have them until symptoms begin. If you’ve experienced sudden abdominal pain, bloating after meals, or nausea, your gallbladder could be the reason. Understanding the types of gallstones is important because each type forms differently, affects the body in unique ways, and may require a specific treatment approach.