Clinical Presentation and Management of Crohn's Disease

Core Gastrointestinal Symptoms

Patients with Crohn's disease often experience diarrhea, with severe flares resulting in at least 10 loose stools per day, according to the American Gastroenterological Association 3, 4, 5
Abdominal pain is a cardinal symptom, typically colicky in nature and occurring daily during moderate to severe exacerbations, as noted by the European Crohn’s and Colitis Organisation 1
Weight loss is a common presenting feature, reflecting both malabsorption and reduced oral intake, as reported by the American Gastroenterological Association 1, 6
Anorectal manifestations, including anorectal pain, bowel urgency, fecal incontinence, perianal discharge, and tenesmus, are associated with Crohn's disease, according to the American Gastroenterological Association 3, 4, 5

Fever is more common in Crohn's disease flares than in ulcerative colitis, as noted by the Crohn's & Colitis Foundation 2
Malaise and anorexia are systemic symptoms that distinguish Crohn's flares from other inflammatory bowel conditions, according to the European Crohn’s and Colitis Organisation 2

Elevated C-reactive protein (CRP) is a marker of inflammatory burden during flares, as reported by the American Gastroenterological Association 3, 4, 5
Low albumin reflects both inflammation and nutritional status, according to the American Gastroenterological Association 3, 4, 5
Anemia is a common finding during active disease, as noted by the American Gastroenterological Association 3, 4, 5

The Crohn's Disease Activity Index (CDAI) defines moderate to severe disease as a score of 220-450, with severe disease exceeding 450, as reported by the American Gastroenterological Association 3, 4, 5, 7
The International Organization for the Study of Inflammatory Bowel Disease characterizes severe flares based on multiple factors beyond symptoms alone, including structural damage indicators and clinical indicators of severity, according to the International Organization for the Study of Inflammatory Bowel Disease 3, 4, 5

Inflammation frequently persists without gastrointestinal symptoms, potentially leading to progressive bowel damage even when patients report feeling well, as noted by the Crohn's & Colitis Foundation 7
Intestinal obstruction from strictures may mimic a flare but requires different management, according to the Crohn's & Colitis Foundation 2
Abscess formation can present with fever and abdominal pain but needs drainage rather than immunosuppression alone, as reported by the American Gastroenterological Association 3, 4, 5