Signs Your Diverticulitis Could Be in a Flare-Up

July 21, 2021
For people who have felt the steady, sharp abdominal pain of a diverticulitis attack, another flare-up is not something that you’d want to experience again, although it may happen: More than half of people who experience diverticulitis once are likely to have another flare-up.
Diverticulitis is the name for the condition caused by inflammation or infection of the diverticula, which are small, bulging pouches that sometimes develop in weak spots along the wall of someone’s colon or large intestines.
“Diverticula may form as people get older, particularly if they’re overweight, don’t exercise and eat a low-fiber diet,” says Steven Koerner, D.O., FACOI, gastroenterologist at Hackensack Meridian Medical Group.
“In most people, these extra bulges along the colon wall don’t cause health problems, and most people don’t realize that they have them. But when diverticula becomes inflamed or infected, the resulting diverticulitis can be quite painful.”
Symptoms of a diverticulitis flare-up
If you think that you may have diverticulitis, or if you’ve been diagnosed before and you think that you’re having a flare-up, call or see your doctor. Common symptoms of diverticulitis include:
- Constant abdominal pain that lasts for days, typically on the lower left side of the abdomen (although some people experience it on the lower right side)
- Nausea and/or vomiting
- Fever and/or chills
- Constipation or diarrhea
- Abdominal tenderness or cramping
- Rectal bleeding
You’re more likely to experience a diverticulitis flare-up if you are:
- Over age 40
- Overweight or obese
- A smoker
- Physically inactive
- Someone whose diet is high in animal products and low in fiber (most Americans)
- Someone who takes non-steroidal anti-inflammatory drugs (NSAIDs), steroids or opioids
- Treatment for a diverticulitis flare-up
If you’re having a diverticulitis flare-up, your doctor can prescribe antibiotics to fight the infection. Be sure to take the medication for the entire course that it’s prescribed, rather than stopping when you start to feel better. Your doctor may also suggest that you:
- Consume a liquid diet or low-fiber diet until your flare-up improves
- Rest as needed
- Sometimes, doctors recommend surgery for people with more serious flare-ups or recurrent diverticulitis. Surgical removal of the affected portion of the colon (and the infected or inflamed diverticula) should resolve the problem.
- How to lower your risk of diverticulitis flare-ups
“It may not be possible to guarantee that you’ll never have another diverticulitis flare-up, but you may lower your risk of a recurrence if you follow certain healthy lifestyle habits,” says Dr. Koerner.
Try to adopt habits like these:
- Eat a high-fiber diet, with plenty of whole grains, fruits and vegetables
- Drink plenty of water
- Exercise regularly
- Quit smoking
In the past, doctors used to tell people with diverticulitis that they should avoid eating popcorn, nuts, large and small seeds (pumpkin seeds, sesame seeds and everything in between) and foods which contain seeds (including tomatoes and strawberries) to reduce the risk of a flare-up, but this is an outdated recommendation. Feel free to eat these foods, unless they cause you discomfort.
Next Steps & Resources
- Meet our source: Steven Koerner, D.O., FACOI
- To make an appointment with Dr. Koerner, or a doctor near you, call 800-822-8905 or visit our website.
The material provided through HealthU is intended to be used as general information only and should not replace the advice of your physician. Always consult your physician for individual care.
Can Protein Help with Joint Pain?

If you experience chronic joint pain from osteoarthritis (arthritis), different lifestyle habits – like maintaining a healthy weight and exercising regularly – may help to improve your discomfort.
Should You Drink Apple Cider Vinegar Before Bed?

Have you been looking for creative ways to lose weight? Some people have read online that taking apple cider vinegar may help with weight loss, and they may commit to taking a shot of the sour stuff every day, sometimes at bedtime.

The Best and Worst Things You Can Do for Hemorrhoids
Hemorrhoids are uncomfortable, they bleed, and they make going to the bathroom a challenge. They’re also very common.

How Losing Weight Can Increase Your Life Expectancy
There are quite a few consequences of obesity, including conditions such as high blood pressure, diabetes, high cholesterol and heart disease.

8 Workday Snacks That May Boost Your Immune System
When you’re hungry for a snack in the afternoon, do you instinctively reach for a cookie or a bag of chips?

Worst Foods to Eat for Your Health
If you haven’t thought about whether or not the foods that you consume are truly nourishing you, take time to examine your eating habits to ensure that you’re meeting your nutritional goals.