What causes cholecystitis?

What causes cholecystitis?

Cholecystitis is commonly caused by gallstones that have blocked your cystic duct, which prevents bile from exiting your gallbladder. Your gallbladder becomes swollen and may become infected with bacteria. Less common causes include blocked bile ducts due to scarring, reduced blood flow to your gallbladder, tumors that block the flow of bile from your gallbladder, or viral infections that inflame your gallbladder.