Quick read
Key points
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Diverticular disease refers to the presence of small pouches (diverticula) that can form in the wall of the large intestine, becoming more common with age. Most people with diverticula have no symptoms at all, but some experience mild abdominal discomfort, bloating, or changes in bowel habit.
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Topic-specific prevention and risk reduction will be added during the article-specific evidence audit.
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You develop new or worsening abdominal pain, particularly on the lower left side
01 · Know
What is Diverticular Disease and Diverticulitis?
Diverticular disease refers to the presence of small pouches (diverticula) that can form in the wall of the large intestine, becoming more common with age. Most people with diverticula have no symptoms at all, but some experience mild abdominal discomfort, bloating, or changes in bowel habit.
Diverticulitis occurs when one or more of these pouches becomes inflamed or infected, causing more significant abdominal pain, usually on the lower left side, along with fever and feeling unwell. Mild cases can often be managed with antibiotics and dietary changes, while more severe cases need hospital treatment.
02 · Understand
Clinical context
A high-fibre diet helps prevent flare-ups long-term
Once any acute diverticulitis flare-up has settled, a gradual return to a high-fibre diet is generally recommended to help prevent future episodes, though your doctor can advise on timing.
03 · Act
When to Seek Care
- 1You develop new or worsening abdominal pain, particularly on the lower left side
- 2You have fever alongside abdominal discomfort
- 3You've been diagnosed with diverticular disease and want dietary guidance
- 4Symptoms of a flare-up aren't improving with treatment
04 · Prevent & manage
Practical steps
During a Flare-Up, Diet Recommendations Differ from Long-Term Advice
During an acute diverticulitis flare-up, a low-fibre diet is often recommended temporarily to rest the bowel, which is different from the high-fibre diet generally recommended for long-term prevention — follow your doctor's specific guidance for each phase.
- 1Take antibiotics if prescribed, completing the full course.This treats the infection during an acute flare-up.
- 2Follow dietary advice specific to your current situation.This may mean a temporary low-fibre diet during a flare-up, followed by a gradual return to high-fibre eating.
- 3Stay hydrated.This supports recovery and helps with the transition back to a higher-fibre diet.
- 4Take appropriate pain relief as advised.Your doctor can recommend suitable options for managing discomfort.
- 5Seek prompt care for worsening symptoms.Increasing pain, fever, or feeling more unwell needs reassessment.
Medical information notice
Health education, not individual medical advice
BarnMD Health Library provides general health education for public health literacy. Reading this article does not establish a doctor-patient relationship and this information is not a diagnosis, prescription, or personalised treatment plan. If you have symptoms or concerns about your health, seek appropriate advice from a qualified healthcare professional. If you develop emergency warning signs, seek urgent or emergency medical attention.
BarnMD Bottom Line
Diverticular disease is common and often causes no symptoms, while diverticulitis flare-ups are treatable with antibiotics and dietary management.
Severe abdominal pain, high fever, or persistent vomiting alongside diverticulitis need urgent medical assessment.