Diverticular Disease and Diverticulitis

Last Updated: July 3, 2026

Key Points

Small pouches (diverticula) form in the large intestine
Diverticulosis means pouches are present without symptoms
Diverticulitis occurs when pouches become inflamed or infected
Symptoms include abdominal pain and changes in bowel habits
Diet and lifestyle changes can help manage the condition

Overview

Diverticular disease and diverticulitis involve the large intestine, also known as the bowel. Small bulges or pouches, called diverticula, can form in the walls of the intestine. When these pouches are present but cause no symptoms, it's called diverticulosis. Most people develop some diverticula as they age, but many never experience symptoms. However, if these pouches become infected or inflamed, the condition is known as diverticulitis, which can cause more severe pain and other issues. Management often involves dietary adjustments, lifestyle changes, and medications to control symptoms. In some cases, particularly with diverticulitis, antibiotics or even surgery may be needed to address complications.

Signs and Symptoms

Pain in the lower left side of the tummy
Tummy pain worse after eating, better after bowel movement
Constipation or diarrhea
Bloating
Blood in your stool
Severe, constant tummy pain (with diverticulitis)
High temperature (with diverticulitis)
Passing mucus from your bottom (with diverticulitis)

Things That Increase the Risk

Getting older
Low fiber diet
Smoking
Being overweight or obese
Taking NSAIDs (like ibuprofen) or opioid painkillers

Diagnosis

Doctor's assessment of symptoms and medical history
Blood tests
Stool sample analysis
Colonoscopy or flexible sigmoidoscopy (tube with camera)
CT scan

Treatment & Management

Painkillers like paracetamol
Bulk-forming laxatives for constipation or diarrhea
Medicines for stomach cramps (antispasmodics)
Antibiotics for infection (diverticulitis)
Hospital care for severe cases
Surgery for complications like abscesses or blockages

Prevention

Eat a healthy, balanced diet with whole grains, fruits, and vegetables
Slowly increase fiber intake and drink plenty of water
Stop smoking
Maintain a healthy weight
Avoid NSAIDs and opioid painkillers unless advised by a doctor

Available Treatments

Explore our range of treatment options for Diverticular Disease and Diverticulitis: