HomeconditionIt's Important to Know the Difference Between Diverticulosis and Diverticulitis—Here's Why

It's Important to Know the Difference Between Diverticulosis and Diverticulitis—Here's Why

Anyone who's ever struggled with a digestive ailment knows one thing for sure: When your gut feels good, you feel good—and when it doesn't, well, it can throw your entire life out of whack.

But here's the thing about gut health: There are quite a few conditions that affect it, and they all present pretty similarly (abdominal pain, change in bowel habits, you know the gist). Diverticulitis is one of those conditions—but it can sometimes be confused with something called diverticulosis, which can be a precursor to diverticulitis.

Though these conditions sound similar—and one can lead to the other—it's important to be able to distinguish between the two. Right up front, the names of the conditions themselves can offer essential clues: the suffix "osis"—as in diverticulosis—denotes a condition or disease; the suffix "itis"—as in diverticulitis—references the presence of inflammation.

Here, experts explain what exactly links these conditions together, and what sets them apart—and how to prevent one from leading to the other.

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What's-the-Difference-Between-Diverticulitis-and-Diverticulosis-GettyImages-892955986-AdobeStock_229301379 What's-the-Difference-Between-Diverticulitis-and-Diverticulosis-GettyImages-892955986-AdobeStock_229301379 (NIDDK). These pouches, called diverticula, can push through weak spots of the wall of your colon—that's called diverticulosis.

For many people, those diverticula don't cause issues. In fact, many people live with diverticulosis without any complications. Per the NIDDK, more than 30% of adults between the ages of 50 and 59 have the condition—that number rises to 70% in people over 80 years old. But "fewer than 5 percent of people with diverticulosis will ever have a problem," Lisa Strate, MD, a gastroenterologist, researcher, and professor of medicine at the University of Washington in Seattle, tells Health.

Because diverticulosis itself doesn't present symptoms, it's most often found during routine colonoscopies, according to a recent review article in Mayo Clinic Proceedings. It may also show up on radiological exams, like abdominal CT scans, another recent review in Nature Reviews Disease Primers points out.

But again: Many people with diverticulosis won't develop symptom or problems from the condition—when they do, and when the diverticula become inflamed, that's known as diverticulitis.

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So What Is Diverticulitis, Exactly, and How Does It Develop?

Diverticulitis means one or more diverticula in the colon wall have become inflamed or infected. According to the American Gastroenterological Association (AGA), it often comes on quickly and can cause symptoms such as abdominal pain (usually on the lower left side), stomach cramping, bowel changes (constipation or diarrhea), chills, and fever.

The NIDDK says about 200,000 people are hospitalized with diverticulitis each year, but diverticulitis is only one part of diverticular disease, which is when diverticula cause chronic symptoms, or when someone experiences diverticular bleeding, diverticulitis, or complications from diverticulitis.

While diverticular bleeding speaks for itself (it's when a small blood vessel within the wall of the diverticulum pouch bursts, and can cause life-threatening blood loss), complications from diverticulitis can look like the following, per the NIDDK:

  • An abscess in the colon
  • Fistula (an abnormal connection between two body parts, like the bowel and vagina)
  • Intestinal obstruction
  • Perforated colon
  • Peritonitis (an infection in the abdominal cavity)

While people are more likely to develop diverticular disease a they age, experts aren't entirely sure what else causes the condition. Per the NIDDK, they do, however, the following factors can increase a person's risk of developing the disease:

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How can you prevent diverticulosis from turning into diverticulitis?

Right off the bat: Experts don't know exactly how many people with diverticulosis will develop symptoms if they do not have diverticulitis, the NIDDK says—and most people don't know they have diverticulosis until they experience an initial episode diverticulitis.

If you have had a diverticulitis flare before—which your doctor may try to clear up with antibiotics, a clear liquid diet, and pain medication, the NIDDK says—it's likely that your main goal is not to have another one. The AGA, NIDDK, and Mayo Clinic suggest the following measures to help prevent a recurrence:

  • Adopt a high-fiber diet: Slowly start increasing your fiber intake by eating more plant-based foods, including fruits, vegetables, whole grains, and legumes.
  • Hydrate: You need plenty of liquids to replace the fluids that are absorbed by the fiber in your diet. Otherwise, you may end up constipated.
  • Be physically active: Vigorous, heart-pumping exercise may be particularly helpful.
  • Quit smoking:
  • Achieve or maintain a healthy weight: Obesity is strongly linked to diverticulitis.
  • Avoid using NSAIDS: Unless it's advised by a doctor, try not to use pain relievers two or more times a week.

It really boils down to living a living a healthy lifestyle, Dr. Strate points out: "A healthy lifestyle is protective against so many things—diabetes, heart disease—that it makes sense for people to try and aim for that."

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