Understanding Acute Cholecystitis

Gallstones: These are small, hardened deposits of cholesterol or other material that can form in the gallbladder. If a gallstone blocks the cystic duct, the tube that carries bile from the gallbladder to the small intestine, bile can become trapped in the gallbladder and cause inflammation.
Acute acalculous cholecystitis: This is a less common form of acute cholecystitis that occurs in people who do not have gallstones. It is often caused by a serious illness, such as sepsis or major surgery.

Here are some of the symptoms of acute cholecystitis:
Sudden and severe pain in the upper right abdomen, which may radiate to the right shoulder blade
Nausea and vomiting
Fever
Chills
Loss of appetite
Jaundice (yellowing of the skin and whites of the eyes)

If you are experiencing any of these symptoms, it is important to seek medical attention immediately. Early diagnosis and treatment of acute cholecystitis can help prevent complications, such as infection, gangrene (tissue death), and perforation (a hole in the gallbladder).
Here are some images that can help you understand what acute cholecystitis is:
A normal gallbladder:Opens in a new windowradiopaedia.org
Normal gallbladder
A gallbladder with gallstones:Opens in a new windowwww.mayoclinic.org
Gallbladder with gallstones
An inflamed gallbladder:Opens in a new windowmy.clevelandclinic.org
Inflamed gallbladder
A perforated gallbladder:Opens in a new windowradiopaedia.org
Perforated gallbladder

I hope this information is helpful. Please let me know if you have any other questions.