Diverticulosis vs. Diverticulitis: What's the Difference and When You Need a Colonoscopy

By Dr. Jeffrey Earl, Colonoscopy KC

If a recent colonoscopy report mentioned "diverticulosis," you may have left the office with a new word in your vocabulary and a few questions you didn't think to ask at the time. You're not alone — diverticulosis is extremely common, especially as we get older, and most people who have it will never know unless a doctor happens to see it. Here's a plain-English look at what diverticulosis is, how it differs from diverticulitis, and when a colonoscopy is the right next step.

What Is Diverticulosis?

Diverticulosis is the presence of small, bulging pouches — called diverticula — in the wall of the colon. They form when weak spots in the colon's muscular lining give way under pressure, usually over many years. Think of them as tiny pockets that push outward from the inside of the intestine.

These pouches are very common. Roughly half of people over age 60 have diverticulosis, and the likelihood rises with age. For the vast majority, the condition causes no symptoms at all. Many people first learn they have diverticulosis only when a colonoscopy reveals it during a routine screening — which is also why it's usually nothing to panic about.

What Is Diverticulitis?

Diverticulitis is what happens when one or more of those pouches becomes inflamed or infected. It's the complication of diverticulosis, not a separate disease, and only a minority of people with diverticulosis ever develop it.

When diverticulitis flares, the symptoms are hard to ignore:

• Pain — most often in the lower left side of the abdomen, which may be constant and worsen over a few days
• Fever and chills
• Nausea or vomiting
• A change in bowel habits — constipation or, less often, diarrhea
• Bloating and tenderness

A mild flare can sometimes be managed at home with a liquid diet, rest, and, when appropriate, antibiotics. A more severe flare — especially one involving an abscess, a perforation, or a blockage — may require hospitalization or even surgery. That's why new or worsening abdominal pain should never be ignored.

What Causes These Pouches — and Who's at Risk?

Age is the biggest risk factor, but several others contribute:

• A low-fiber diet, which can lead to constipation and higher pressure inside the colon
• Obesity, smoking, and a sedentary lifestyle
• Certain medications, including long-term NSAIDs, steroids, and opioids

The old advice to avoid nuts, seeds, and popcorn has largely been retired — there's little evidence they cause flares — but every patient is different, and your doctor can help you settle on the right plan.

How Is Diverticulosis Diagnosed?

A colonoscopy is the most definitive way to diagnose diverticulosis. During the procedure, Dr. Earl examines the entire lining of the colon with a thin, flexible scope and can see the diverticula directly — while also ruling out other possible causes of your symptoms, such as polyps, colorectal cancer, or inflammatory bowel disease.

There's one important timing note. If you're in the middle of an acute diverticulitis flare, a CT scan is often the first step, because it's gentler on an inflamed colon. A colonoscopy is then typically scheduled about six to eight weeks after the flare has settled, to confirm the diverticulosis and make sure nothing else is going on.

When Should You Get a Colonoscopy?

Several situations point toward scheduling a colonoscopy:

• You're 45 or older and due for a routine screening — the most common way diverticulosis is found
• You've had a flare of diverticulitis and need a follow-up exam to confirm the diagnosis
• You have persistent changes in bowel habits, blood in your stool, unexplained abdominal pain, or unexplained anemia

Because diverticulosis itself is usually silent, the only reliable way to know what's happening in your colon is to look.

Getting Started at Colonoscopy KC

If diverticulosis — or any digestive symptom — is on your mind, the clearest path forward is a conversation with a doctor, not a guess. Colonoscopy KC is led by Dr. Jeffrey Earl, a physician with more than 30 years of experience performing colonoscopies and upper endoscopies.

Our approach is built around transparency. A colonoscopy is a flat, all-inclusive cash price of $1,275 — covering the consultation, the procedure, anesthesia administered by a CRNA, pathology, and facility fees. There's no insurance to sort through, no referral needed, and no surprise bill weeks later. Financing is available through CareCredit if you'd like to spread the cost over time.

Procedures are performed at WestGlen Endoscopy Center in Shawnee, Kansas, and are often scheduled in as little as two weeks. We serve patients throughout the Midwestern United States.

One phone call can give you a clear answer about what's going on in your colon. Call (913) 379-3350 to request a complimentary phone consultation today.