Diverticulosis, the widespread gut condition doctors want you to understand, that most people over 80 have these tiny pouches in their gut. Aging shows up on the outside in obvious ways fine lines, silver hair, skin that tells its own story. But the changes happening inside the body are just as real, even if they are far less visible. One of the most common of those internal shifts involves the digestive tract, and by the time most people reach 80, it has already occurred.
By that age, the once smooth lining of the gut in most people is marked by small, bulging pockets of tissue. These pouches, known as diverticula, form along the walls of the digestive tract at points where the muscle is weakest. They are not a disease in themselves, and for the vast majority of people, they cause absolutely no symptoms and require no treatment whatsoever.
The condition is called diverticulosis, and for most people, it is simply a quiet fact of getting older.
How diverticulosis differs from diverticulitis
One of the most common sources of confusion around this condition is its name specifically, how closely it resembles another term: diverticulitis. Gastroenterologists often help patients distinguish the two by pointing out that diverticulosis refers to the pockets themselves, while diverticulitis refers to inflammation of those pouches.
That distinction matters because the two carry very different implications. Diverticulosis alone is largely harmless. Diverticulitis which occurs when the pouches become inflamed or infected is a different matter. It can bring on symptoms including abdominal pain, bloating, constipation, diarrhea and fever, and it qualifies as diverticular disease.
Even then, the outlook is often manageable. More than 85 percent of people with diverticulitis find that a few days of rest and a liquid diet are enough to bring symptoms under control. In more serious cases, antibiotics or, rarely, surgery may be required. When surgery is needed, however, outcomes are generally strong roughly 90 percent of patients who have the affected section of intestine removed do not experience a recurrence of symptoms.
Where in the gut these pouches tend to form
While diverticula can develop in both the large and small intestine, around 95 percent of patients in Western countries have them in the sigmoid colon the lower section of the large intestine responsible for moving waste into the rectum. That area operates under significant pressure, and it is thought that this pressure may be one of the factors contributing to the formation of these pouches in the first place.
When aggravated, diverticula can also bleed, much like hemorrhoids. Diverticular bleeding is estimated to account for between 30 and 65 percent of all lower gastrointestinal bleeding cases. Though it is usually painless and tends to resolve on its own, blood in the stool should always be evaluated by a doctor promptly, since it can indicate other serious conditions as well.
What influences whether diverticula develop
No one has pinpointed a single cause. Diverticulosis is notably more common in Western countries such as the United States, the United Kingdom and Australia where diets tend to be lower in fiber and relatively rare in parts of Africa and Asia, where fiber intake is generally higher.
A high fiber diet, typically between 25 and 30 grams per day, is one of the most widely recommended strategies for people managing this condition. It will not reverse existing diverticula, but evidence suggests it may help prevent new ones from forming. People between 50 and 70 who eat a fiber rich diet have been found to have a 40 percent lower risk of hospitalization related to diverticular disease compared to those with the lowest fiber intake, according to the U.K.’s National Health Service.
Other factors associated with increased risk include obesity, smoking and a sedentary lifestyle. The role of antibiotics, probiotics and other gut influencers on diverticula formation remains an active area of research.
When to see a doctor
Diverticulosis is typically discovered incidentally often during a colonoscopy performed for another reason and does not require treatment on its own. A CT scan or colonoscopy can confirm the diagnosis if symptoms arise.
Treatment, when necessary, is tailored to the severity of the episode. Mild cases are commonly handled on an outpatient basis with dietary adjustments and over the counter pain relief. Antibiotic use is assessed individually. For anyone who notices blood in the stool or experiences persistent abdominal pain, seeking medical guidance without delay is the recommended course of action.
