Bowel obstruction
Due to stricture or bowel wall edema
Abscess
Can be intraperitoneal, retroperitoneal, interloop, or intramesenteric
More severe abdominal pain than usual
Fever
Hip or back pain and difficulty walking (retroperitoneal abscess)
Fistula
Occurs due to extension of intestinal fissure into adjacent structures
Suspect if changes in patient's symptoms (e.g. BM frequency, amt of pain, wt loss)
Perianal<unk> 
Abscess, fissures, fistulas, rectal prolapse
Hemorrhage
Erosion into a bowel wall vesel
Toxic megacolon
Can be associated with massive GI bleeding
Due to stricture or bowel wall edema
Can be intraperitoneal, retroperitoneal, interloop, or intramesenteric
More severe abdominal pain than usual
Fever
Hip or back pain and difficulty walking (retroperitoneal abscess)
More severe abdominal pain than usual
Fever
Hip or back pain and difficulty walking (retroperitoneal abscess)
Occurs due to extension of intestinal fissure into adjacent structures
Suspect if changes in patient's symptoms (e.g. BM frequency, amt of pain, wt loss)
Abscess, fissures, fistulas, rectal prolapse
Erosion into a bowel wall vesel
Can be associated with massive GI bleeding
Leukopenia/thrombocytopenia
Fever/infection
Pancreatitis
Renal/liver failure
Crohn's disease
Viral gastroenteritis
Irritable bowel syndrome
Bacterial gastroenteritis
Ulcerative colitis
Campylobacter infections
Celiac disease
Clostridium difficile colitis