Well that sounds awful. Any ideas on how they occur? Is it luck if the draw or from food/drink?
The doctors don't really KNOW what causes gallstones, but they have a pretty good idea what aids in their formation.
There are 2 types of gallstones - cholesterol based and bilirubin based. The stones form when the bile stored in the gallbladder has too much of one or the other and starts to clump or condense into "stones". Cholesterol based are yellowish and bilirubin ones are dark brown to black.
Contributors to cholesterol stones are a high cholesterol diet, high fat diet (and the subsequent high cholesterol levels in the blood), lower fiber diets, sedentary lifestyle, having diabetes, being overweight or obese.
Bilirubin stones come from excess bilirubin, which is the result of old red blood cells being broken down in the liver. Contributing factors to these stones are liver diseases, cirhosis of the liver, blood disorders such as sickle cell anemia, general anemia, or leukemia.
And as with all diseases, heredity/family history plays a big part, as well.
Mine was most likely due to heredity. My mother and little sister both had their gallbladders removed. My mother's was full of stones, my sisters had crystalized. Mine was "full of sludge".
I have been on a low cholesterol diet/low fat diet for years. All my blood tests for years have been within normal limits. I don't drink a lot of alchohol, which is the leading cause of liver diseases. So I guess I just "got lucky" with the heredity factor.
The internet has a bunch of articles about gall bladder friendly diets, but they are all kinda BS speculation and boils down to loose weight slowly, eat a high fiber diet, limit saturated fats in your diet, exercise and maintain a healthy weight. The same stuff doctors always tell you to do anyway.