Peritonitis is inflammation of the peritoneum — a silk-like membrane that lines your inner paries and covers the organs at intervals your abdomen — that's sometimes thanks to a bacterial or fungal infection.
Peritonitis may end up from any rupture (perforation) in your abdomen, or as a complication of different medical conditions.
Peritonitis requires prompt medical attention to fight the infection and, if necessary, to treat any underlying medical conditions.
Treatment of rubor sometimes involves antibiotics and, in some cases, surgery. Left untreated, rubor will result in severe, doubtless serious infection throughout your body.