Diverticular disease and diverticulitis

Also called Diverticulosis, Diverticulitis, or Diverticula

Diverticula are small bulges or pouches that develop in the lining of the large bowel, very common after the age of 50. Having them is called diverticulosis and often causes no symptoms. Diverticular disease is when they cause symptoms such as tummy pain, and diverticulitis is when they become inflamed or infected.

Last updated Nov 9, 2026

What it is

A diet high in fibre, drinking enough fluids, staying active and not smoking may help prevent symptoms.

Mild diverticulitis is often treated at home with rest and fluids, sometimes antibiotics. Severe cases or complications such as abscesses or bleeding need hospital care and sometimes surgery.

Common signs

  • Tummy pain, usually in the lower left side
  • Bloating, constipation or diarrhoea
  • With diverticulitis: constant severe pain, fever, feeling sick
  • Occasionally blood in the stool

How it is usually diagnosed

  • Examination and blood tests
  • CT scan during a flare
  • Colonoscopy or CT colonography after it settles

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • CT and colonoscopy reports
  • Dates of flare-ups and treatments
  • Hospital discharge summaries

Questions to ask your doctor

  • Do I need antibiotics for this flare?
  • What diet should I follow?
  • Do I need a colonoscopy to rule out other causes?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • Severe tummy pain that keeps getting worse, high fever, or heavy bleeding from the bottom: go to an emergency department

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

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