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Diverticulitis is a condition that arises when small, bulging pouches (diverticula) in the digestive tract become inflamed or infected. These pouches can develop anywhere in the digestive system, but they most commonly form in the colon (the lower part of the large intestine). The presence of these pouches is known as diverticulosis, which by itself often causes no or few symptoms. However, when inflammation or infection occurs, the condition is referred to as diverticulitis.



The exact cause of diverticulitis is not fully understood, but it is believed to be related to a low-fiber diet. Fiber helps to soften stools and makes them easier to pass, reducing pressure inside the digestive system. Without sufficient fiber, the colon has to work harder to move stools, which can increase pressure and lead to the formation of diverticula. If these pouches become blocked with waste, bacteria can build up and lead to infection or inflammation.


Symptoms of diverticulitis can range from mild to severe and may include:

  • Pain, which may be sudden and severe, or mild but worsening over a few days, typically on the lower left side of the abdomen
  • Fever and chills
  • Nausea and vomiting
  • A change in bowel habits (constipation or, less commonly, diarrhea)
  • Abdominal bloating


Diverticulitis is usually diagnosed through a medical history and physical examination. Your doctor may also order tests to confirm the diagnosis, such as:

  • Blood tests to check for signs of infection
  • CT scans are particularly useful in diagnosing diverticulitis as they can show the extent of inflammation and whether there is an abscess
  • Ultrasound or MRI in specific cases


Treatment for diverticulitis depends on the severity of symptoms. Mild cases can often be treated at home with rest, diet modifications (initially a liquid diet to let the colon rest), and antibiotics to treat the infection. Pain relief medication is also often prescribed.

For more severe cases, hospitalization may be necessary to administer IV antibiotics and possibly surgery if there is a complication such as a perforation in the colon, an abscess, or a significant obstruction.


Preventing diverticulitis mainly involves diet and lifestyle changes to prevent the formation of diverticula or to prevent existing diverticula from becoming inflamed. These include:

  • Eating a high-fiber diet: Fruits, vegetables, and whole grains can help to soften stool and decrease pressure inside the colon.
  • Drinking plenty of fluids: To help fiber work better in your diet.
  • Regular exercise: To maintain a healthy bowel function.
  • Avoid smoking: Smoking is a risk factor for developing diverticulitis.


If left untreated, diverticulitis can lead to several serious complications, including:

  • Abscesses: Pockets of infection that can rupture and spread bacteria within the abdomen.
  • Peritonitis: A potentially life-threatening infection that occurs if an infected diverticulum ruptures and spills intestinal bacteria into the abdominal cavity.
  • Fistulas: Abnormal connections that can form between sections of the bowel or the bowel and other organs, such as the bladder.
  • Intestinal obstructions: Caused by scarring, leading to blockages of the intestine.
  • Bleeding: Though less common, diverticulosis can cause significant bleeding even without infection.

Managing diverticulitis and diverticulosis effectively is crucial to maintaining digestive health and avoiding complications. If you suspect you have diverticulitis, it’s important to seek medical advice promptly for appropriate treatment and management strategies.

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