Tumor. A tumor could retain bile from draining out in the gallbladder since it ought to. This causes bile buildup that can cause cholecystitis. Slowed blood circulation from low blood pressure. Low blood pressure can be because of shock, coronary heart failure, certain medicines or ongoing kidney failure, identified as https://www.sgvascularctr.com/treatments-for-gangrene-insights-from-a-vascular-surgeon/