Describe for me the symptoms of peritonitis? Who is likely to get this?

Peritonitis. Peritonitis is a serious intra-abdominal inflammation usually from infection or from leakage from a hole in the intestine, leaking into the abdominal cavity. There is usually severe abdominal pain, vomiting, sometimes fever. Who gets this could be ruptured appendicitis, perforation from stomach ulcer or colon diverticulitis, etc.
Red bleeding gums. Periodontal disease is usually painless. When it hurts or starts to bleed then it needs to be treated or it may be too late and you may lose your teeth. It should be diagnosed by your dentist using a periodontal probe. Anybody can get gum disease.