A gangrenous gallbladder usually develops as a complication of untreated or severe acute cholecystitis , most often when a gallstone blocks the cystic duct, bile backs up, pressure rises, and blood flow to the gallbladder wall gets cut off, leading to tissue death. It is a medical emergency, not something to wait on.

How it happens

  • A gallstone blocks bile outflow.
  • The gallbladder becomes inflamed and swollen.
  • Pressure and inflammation reduce blood supply.
  • Parts of the wall lose oxygen and die, becoming gangrenous.

Risk factors

Common risk factors include increasing age, diabetes, cardiovascular disease, delayed treatment, and severe acute cholecystitis. Some sources also note higher rates in men and in people with systemic illness.

Symptoms to watch for

  • Severe right-upper abdominal pain.
  • Fever.
  • Nausea or vomiting.
  • Worsening pain, confusion, or signs of sepsis in advanced cases.

Why it matters

Gangrenous cholecystitis has a much higher complication risk than uncomplicated gallbladder inflammation and can be fatal without urgent treatment. The usual treatment is emergency surgery plus antibiotics and supportive care.

Important note

If this question is about current symptoms, especially strong abdominal pain with fever, vomiting, or jaundice, that needs urgent medical evaluation now.