What are the typical symptoms of diverticulitis?

Typical Symptoms of Diverticulitis

The hallmark symptom of acute diverticulitis is acute pain or tenderness in the left lower quadrant, which may be accompanied by fever, elevated inflammatory markers (C-reactive protein and white blood cell count), and changes in bowel habits. 1

Core Clinical Presentation

Primary Symptoms

• Left lower quadrant abdominal pain - present in approximately 67% of patients, typically acute or subacute in onset 1, 2
• Fever - occurs in 37.5-71% of patients, often with temperature >38°C 1, 2
• Abdominal tenderness - localized to the left lower quadrant on examination 1

Associated Symptoms

• Nausea - present in 86% of patients, though notably vomiting is often absent 1, 2
• Changes in bowel habits - including constipation or diarrhea 1, 3
• Anorexia - occurs in approximately 50% of patients 3, 4
• Abdominal distention 3
• Dysuria - may occur due to bladder irritation 3

Laboratory Findings

Elevated inflammatory markers are characteristic:

• C-reactive protein (CRP) >50 mg/L - a key diagnostic indicator 1
• Leukocytosis - present in 90% of patients 2
• CRP >170 mg/L - significantly discriminates severe from mild diverticulitis with 87.5% sensitivity and 91.1% specificity 1

Clinical Decision Rule

A highly predictive triad exists for diagnosis (97% positive predictive value when all three features present): 1

1. Direct tenderness only in the left lower quadrant
2. CRP >50 mg/L
3. Absence of vomiting

Important Clinical Caveats

Diagnostic Accuracy Limitations

• Clinical examination alone has poor accuracy - positive predictive value of only 0.65, making imaging essential for confirmation 1
• Right lower quadrant pain occurs in 24% of cases - particularly with cecal diverticulitis, which can mimic appendicitis 2, 4

Age-Related Considerations

• Younger patients (<40 years) present similarly but are more likely to be misdiagnosed as appendicitis, especially males with right-sided disease 2
• All pediatric cases in one series were solitary cecal diverticulitis presenting with right lower quadrant pain 4

Chronic Sequelae

• 32-38% of patients develop persistent symptoms after acute uncomplicated diverticulitis, including flatulence, bloating, fullness, and altered bowel habits resembling irritable bowel syndrome 5, 6
• Risk factors for persistent symptoms include mean pain score ≥3.75 during the first 10 days and prolonged time to recovery (≥28 days) 5

Spectrum of Disease Presentation

Uncomplicated diverticulitis involves only the colon without peritoneal extension, presenting with localized symptoms 1

Complicated diverticulitis (12% of cases) extends beyond the colon and may present with: 1

• Signs of abscess formation
• Peritonitis symptoms
• Obstruction
• Fistula formation
• Free perforation with pneumoperitoneum