Figure 1. Normal anatomy. Cholecystitis is the inflammation (or swelling) of the gallbladder. The gallbladder is located towards the upper right abdominal. It stores bile, which is responsible for breaking down the bodyâs fats.Cholecystitis is caused by gallstones blocking the entrance of the gallbladder.ormal anatomy. Cholecystitis is the inflammation (or swelling) of the gallbladder. The gallbladder is located towards the upper right abdominal. It stores bile, which is responsible for breaking down the bodyâs fats.