Small pouches in your bowel can lead to significant inflammation

Science · Published 24 October 2026 Swipe more like this →

In short: Most people develop tiny bulges in their large intestine as they age, but these often remain silent. However, when these pockets become inflamed or infected, they transform into a condition that can cause severe abdominal pain and systemic symptoms.

Diverticular disease is characterized by the presence of diverticula—small pouches or bulges in the walls of the large intestine (bowel). While many people develop these structures as they get older, the majority do not experience any accompanying symptoms. When these pouches remain asymptomatic, the condition is referred to as diverticulosis. These structural changes are common features of the aging process in the large intestine. Most people will not develop any noticeable symptoms from these bulges.

The situation changes significantly when the intestine becomes infected or inflamed, a state known as diverticulitis. This transition can manifest as severe, constant abdominal pain, often localized in the lower left side of the tummy, though some individuals experience pain on the right side. Other common symptoms include bloating, constipation, diarrhea, and blood or mucus in the stool. Because these signs overlap with conditions like irritable bowel syndrome (IBS), clinical diagnosis requires careful evaluation. Patients might notice that their abdominal discomfort intensifies following a meal and eases after passing gas or having a bowel movement. High temperatures or shivering can also occur during an active flare-up.

Management depends on whether the condition is active or chronic. Diverticulosis symptoms are often managed with painkillers, bulk-forming laxatives for bowel regularity, and antispasmodics for cramps. In contrast, diverticulitis may require antibiotics if an infection is present. Healthcare providers typically use blood tests, stool samples, CT scans, or endoscopic procedures like a colonoscopy to confirm the diagnosis and rule out other underlying issues. Medical professionals may request a poo sample to help identify the specific cause of your symptoms. They might also perform a flexible sigmoidoscopy using a thin tube equipped with a small camera to inspect the interior of the bowels.

General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.

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