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Diverticulitis

Medically Reviewed by Neha Pathak, MD on September 16, 2021

What Is Diverticulitis?

 

Diverticulitis is the infection or inflammation of pouches that can form in your intestines. These pouches are called diverticula.

The pouches generally aren’t harmful. They can show up anywhere in your intestines. If you have them, it's called diverticulosis. If they become infected or inflamed, you have diverticulitis.

Sometimes, diverticulitis is minor. But it can also be severe, with a massive infection or perforation (your doctor will call it a rupture) of the bowel.

What Are the Symptoms of Diverticulitis?

You can have the pouches and not know it. The diverticula are usually painless and cause few symptoms, if any. But you might notice:

  • Cramping on the left side of your abdomen that goes away after you pass gas or have a bowel movement
  • Bright red blood in your poop

Diverticulitis symptoms are more noticeable and include severe abdominal pain and fever.

Diverticulitis can be acute or chronic. With the acute form, you may have one or more severe attacks of infection and inflammation. In chronic diverticulitis, inflammation and infection may go down but never clear up completely. Over time, the inflammation can lead to a bowel obstruction, which may cause constipation, thin stools, diarrhea, bloating, and belly pain. If the obstruction continues, abdominal pain and tenderness will increase, and you may feel sick to your stomach or throw up.

What Causes Diverticulitis?

Doctors aren’t sure. Some studies suggest that your genes might play a role.

The pouches on your intestines get inflamed or infected when they tear or become blocked by feces.

If you have more bad germs than good ones in your gut, that might cause it, too.

Your chances of getting diverticulitis rise with age. It’s more common in people over 40. Other risk factors include:

  • Being overweight
  • Smoking cigarettes
  • Not getting enough exercise
  • Eating lots of fat and red meat but not much fiber
  • Taking certain kinds of drugs, including steroids, opioids, and nonsteroidal anti-inflammatories like ibuprofen or naproxen  

What Are the Complications of Diverticulitis?

If you don’t treat it, diverticulitis can lead to serious complications that require surgery:

  • Abscesses, collections of pus from the infection, may form around the infected diverticula. If these go through the intestinal wall, you could get peritonitis. This infection can be fatal. You’ll need treatment right away.
  • Perforation or tearing in the intestinal wall can lead to abscesses and infection because of waste leaking into the abdominal cavity.
  • Scarring can lead to a stricture or blockage of the intestine.
  • Fistulas can develop if an infected diverticulum reaches a nearby organ and forms a connection. This most often happens between the large intestine and the bladder. It can lead to a kidney infection. Fistulas can also form between the large intestine and either the skin or the vagina.
  • Stricture, which happens when the colon narrows in the affected area.

If you have severe bleeding, you may need a blood transfusion.

How Is Diverticulitis Diagnosed?

The symptoms of diverticulitis can also look like other problems. Your doctor will narrow things down by ruling out other issues. They’ll start with a physical exam. Women may get a pelvic exam, too. Your doctor may then order one or more tests, including:

  • Blood, urine, and stool tests to look for infection
  • CT scans to look for inflamed or infected diverticula
  • A liver enzyme test to rule out liver problems

How Is Diverticulitis Treated?

If your diverticulitis is mild, your doctor will suggest rest and a liquid diet while your intestines heal. They might also give you antibiotics to treat the infection.

Your doctor may also suggest that you take a mild pain reliever like acetaminophen.

You may go on a liquid or “diverticulitis diet.” You’ll start by drinking only clear liquids, such as water, broth, non-pulpy juices, ice pops, and plain tea or coffee. As you start to feel better, you can add low-fiber foods such as eggs, yogurt, and cheese, and white rice and pasta. These foods are gentle on your digestive system.

This treatment works well for most people who have clear-cut cases of diverticulitis.

In more severe cases, you might need to stay in the hospital and take antibiotics that are intravenous (injected into your veins). If you have an abdominal abscess, your doctor will drain it. If your intestine is ruptured or you have peritonitis, you’ll need surgery.

There are two main types:

  • Primary bowel resection. In this procedure, your surgeon will remove diseased parts of the intestine and reconnect the healthy sections. You can have normal bowel movements afterward.
  • Bowel resection with colostomy. This needs to be done if there’s so much swelling that the surgeon can’t reconnect your colon to your rectum right away. Your doctor will create an opening in your abdominal wall so waste can flow into a bag. Surgeons can often reconnect the bowel after the inflammation has passed.

The kind of operation you need depends on the type of complication you have and how serious it is. When you’re healed, your doctor might give you a colonoscopy to rule out colon cancer.

You can prevent diverticulosis and diverticulitis and their complications by eating plenty of fiber, drinking lots of water, and exercising regularly.

WebMD Medical Reference

Sources

SOURCES: 

National Digestive Disease Information Clearinghouse. 

Cleveland Clinic: “Diverticular Disease.”

Mayo Clinic: “Diverticulitis,” “CT scan.”

Merck Manual Consumer Version: “Diverticulitis.”

TeensHealth/Nemours: “Abscess.”

American Society for Gastrointestinal Endoscopy: “Understanding Diverticulosis.”

National Institute of Diabetes and Digestive and Kidney Diseases: “Symptoms & Causes of Diverticulosis and Diverticulitis.”

Harvard Medical School: “Diverticular Disease of the Colon.”

American College of Gastroenterology: “Diverticulosis and Diverticulitis.”

U.S. National Library of Medicine: “Diverticulitis.”

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