Peritonitis
Peritonitis is the inflammation of the thin layer of tissue that lines the inside of the abdomen (tummy) called the peritoneum.
Abdominal (tummy) pain is one of the main symptoms of peritonitis.
Peritonitis occurs when the peritoneum becomes infected with bacteria or fungi.
Peritonitis can often be diagnosed after a physical examination and some further tests.
If you're diagnosed with peritonitis, you will probably be admitted to hospital so you can be carefully monitored.
Serious complications of peritonitis can occur if the infection spreads into other parts of the body.