Symptoms of peritonitis include: 
Belly pain or tenderness.
Bloating or a feeling of fullness in the abdomen.
Fever.
Upset stomach and vomiting.
Loss of appetite.
Diarrhea.
Reduced urine.
Thirst.
Not able to pass stool or gas.
Feeling tired.
Confusion.
 If you get peritoneal dialysis, peritonitis symptoms also may include: 
Cloudy dialysis fluid. 
White flecks, strands or clumps — which are called fibrin — in the dialysis fluid.
