Diverticular Disease
Expert Diagnosis & Management

1 in 3

Over-50s have diverticulosis

80%

Resolve with conservative management

Keyhole

Surgery when needed is minimally invasive

— What is Diverticular Disease?

Understanding Diverticular Disease

Diverticular disease occurs when small pouches — called diverticula — form in the wall of the large intestine (colon), typically where the muscle layer is weakest. These pouches are very common and become more prevalent with age. When they are present but cause no symptoms, the condition is called diverticulosis. When they become inflamed or infected, this is diverticulitis.

Diverticular disease is strongly associated with a low-fibre diet and is one of the most common conditions affecting the large bowel in Western populations. Most episodes of diverticulitis settle with conservative management, but recurrent or complicated disease may require surgical treatment.

Diverticulosis

Diverticulosis (Uncomplicated)

Diverticula are present but cause no symptoms or only mild bloating and discomfort. Managed with dietary optimisation. No surgery required in the majority of cases.

Diverticulitis

Diverticulitis (Complicated)

Inflammation or infection of diverticula causing abdominal pain, fever and change in bowel habit. Complications include abscess, perforation, fistula and stricture.

— Recognising the Condition

Symptoms

Left-sided Abdominal Pain

The most common symptom of diverticulitis. Pain is typically in the lower left abdomen (the sigmoid colon), often constant and worsened by movement.

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Fever and Malaise

Systemic symptoms of infection, including high temperature, chills and fatigue, indicate active inflammation or abscess formation.

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Change in Bowel Habit

Constipation, diarrhoea or alternating bowel habit. Rectal bleeding may occur from diverticular bleeding — which can be brisk.

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Bloating and Wind

Chronic diverticulosis commonly causes abdominal bloating, wind and generalised lower abdominal discomfort.

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Rectal Bleeding

Diverticular bleeding can cause painless, heavy, bright red rectal bleeding. This usually settles spontaneously but requires urgent assessment.

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Urinary Symptoms

Frequency, urgency or passing air or faeculent material in the urine (pneumaturia) suggests a colovesical fistula — a complication requiring surgical treatment.

⚕ Clinical Note

Severe abdominal pain with fever, inability to eat, or signs of peritonism (rigid abdomen) may indicate perforation — attend A&E immediately.

— Diagnosis and Staging

Investigation

1

Clinical Assessment

History and examination to assess severity and likelihood of complications. Blood tests including full blood count and CRP.

2

CT Scan of the Abdomen

The gold standard investigation for acute diverticulitis. Confirms the diagnosis, assesses severity, and identifies complications such as abscess, perforation or fistula.

3

Colonoscopy (After Recovery)

Performed 6 to 8 weeks after resolution of acute diverticulitis to confirm the diagnosis, exclude colitis and ensure there is no underlying malignancy.

— Treatment Options

Management Pathway

1

Conservative Management

For uncomplicated diverticulitis and diverticulosis
  • High-Fibre Diet The single most important long-term measure. Increasing dietary fibre reduces intracolonic pressure and the risk of further diverticular episodes.
  • Antibiotics Oral antibiotics are used for uncomplicated diverticulitis managed in the community. Intravenous antibiotics are required for hospitalised patients with more severe episodes.
  • Analgesia and Rest Short-term analgesia and a period of reduced activity during acute episodes. Clear fluids initially, progressing to normal diet as symptoms settle.
Most episodes of uncomplicated diverticulitis settle within 7 to 10 days of conservative management. Recurrence rates are around 20 to 30% over 5 years.
2

Percutaneous Drainage

For diverticular abscess — avoiding surgery
  • CT-Guided Drainage Large pericolic or pelvic abscesses can often be drained under CT or ultrasound guidance, avoiding the need for emergency surgery and allowing elective repair at a later date.
  • When Surgery is Still Needed Small abscesses often resolve with antibiotics alone. Large abscesses not amenable to drainage, or those associated with generalised peritonitis, require surgical intervention.
Percutaneous drainage is a highly effective way to manage complicated diverticular disease without emergency surgery, allowing patients to be optimised for elective treatment.
3

Elective Surgical Resection

For recurrent or complicated disease
  • Laparoscopic / Robotic Sigmoid Colectomy The affected segment of bowel is removed with restoration of bowel continuity. Performed laparoscopically or robotically in most cases, allowing faster recovery.
  • Who Needs Surgery? Recurrent diverticulitis (two or more episodes), complicated disease (fistula, stricture, abscess), or failure of conservative management are the main indications.
  • Recovery Most patients return home within 3 to 5 days and resume normal activity within 4 to 6 weeks after laparoscopic colectomy.
Elective sigmoid colectomy effectively prevents further episodes of diverticulitis and treats complications such as fistula and stricture with excellent long-term outcomes.

— Why Choose a Specialist?

Expert Colorectal Care

Diverticular disease ranges from a simple dietary condition to a complex surgical problem. Specialist assessment ensures accurate diagnosis, appropriate imaging, and a clear management plan — whether that is conservative, endoscopic, or surgical.

 
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Accurate Staging

CT imaging and colonoscopy to confirm the diagnosis and exclude malignancy, which can mimic diverticular disease.

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Step-Up Approach

Conservative first, surgery only when genuinely necessary — tailored to your history and severity.

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Minimally Invasive Surgery

Laparoscopic and robotic colectomy for the lowest complication rates and fastest recovery when surgery is required.

Take Control of Diverticular Disease

Expert management can prevent recurrence and treat complications effectively.
Book a consultation with Mr. Kumar today.

Diverticular Disease Anatomy

Diverticular Disease Anatomy
Quick Facts

Population affected

>50% over 60s

Uncomplicated resolution

~80%

Recurrence rate

~25% over 5yr

Surgery needed

~5% of cases

Book a Consultation

Specialist opinion when it matters

Appointments typically within 3–5 working days.