When inflammation strikes the small pouches in your intestinal wall, treatment becomes essential to relieve pain, control infection, and prevent serious complications. The approach to managing diverticulitis ranges from simple dietary adjustments and rest for mild cases to antibiotics and surgery for more severe situations.

Why treating diverticulitis matters: Goals and approaches

The primary goal of treating diverticulitis is to reduce inflammation in the diverticula—small pouches that bulge outward through weak spots in the colon wall—and to resolve any infection that may have developed. When these pouches become inflamed or infected, the resulting condition causes considerable pain and can lead to serious health problems if left untreated.^[1]

Treatment depends heavily on how severe your symptoms are and whether complications have developed. Most people with mild, uncomplicated diverticulitis can be treated at home with simple measures. However, those with severe symptoms, signs of complications, or a high risk for problems typically need hospital care.^[8] The distinction between uncomplicated and complicated diverticulitis shapes the entire treatment strategy.

Uncomplicated diverticulitis means that inflammation and possible infection are present, but no secondary problems have developed. This form heals relatively easily with appropriate care. Complicated diverticulitis, on the other hand, involves additional issues such as abscesses (pockets of pus), perforations (tears in the colon wall), fistulas (abnormal connections between organs), or intestinal blockages.^[2]

Medical societies and healthcare organizations have developed guidelines to help doctors choose the best treatment approach for each patient. These recommendations take into account the stage of disease, the patient’s overall health, any other medical conditions present, and how the patient has responded to past treatments. There is ongoing research into new therapies that might improve outcomes and reduce the need for surgery in the future.^[10]

Standard treatment approaches for diverticulitis

Managing mild, uncomplicated diverticulitis

When diverticulitis is mild and uncomplicated, treatment often begins at home. Your doctor will likely recommend rest to give your digestive system time to heal. A temporary switch to a clear liquid diet allows your colon to rest by reducing the amount of solid material passing through. This means consuming only clear broths, water, and other transparent liquids that don’t stress the inflamed area.^[8]

As your symptoms begin to improve over several days, you can gradually reintroduce solid foods. Your doctor may suggest starting with low-fiber options before eventually returning to a regular, high-fiber diet once you’ve fully recovered. This gradual transition helps prevent sudden stress on the healing tissues.^[19]

The use of antibiotics in uncomplicated diverticulitis has evolved in recent years. Traditionally, doctors routinely prescribed antibiotics to treat the inflammation and prevent infection. However, recent studies have questioned whether antibiotics are always necessary for mild cases. Some research suggests that for selected patients with uncomplicated diverticulitis, antibiotics may not speed recovery or reduce the risk of complications.^[10]

The 2015 American Gastroenterological Association guidelines state that clinicians should be selective when prescribing antibiotics for this group of patients. The decision depends on factors such as symptom severity, the presence of fever, and the patient’s overall health status.^[12] If antibiotics are prescribed, you must complete the entire course even when you start feeling better, to ensure the infection is fully cleared.

For pain management, doctors typically recommend paracetamol (also known as acetaminophen). They may also prescribe antispasmodics—medications that help reduce cramping in the intestines by relaxing the muscles in the digestive tract. Nonsteroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen are generally avoided because they can irritate the stomach lining and increase the risk of complications, including perforation of the bowel.^[5]

Hospital treatment for severe diverticulitis

If your diverticulitis is severe, you have complications, or you’re at high risk for problems, hospitalization becomes necessary. In the hospital, you’ll receive intravenous fluids to keep you hydrated while your digestive system rests. This is particularly important if you’ve been vomiting or unable to keep fluids down.^[8]

Intravenous antibiotics form the cornerstone of hospital treatment for serious diverticulitis. These medications are given directly into the bloodstream, allowing them to reach infected tissues quickly and at higher concentrations than oral antibiotics can achieve. The antibiotics used must cover both gram-negative bacteria (common intestinal bacteria) and anaerobic bacteria (bacteria that thrive without oxygen), as both types are often involved in diverticular infections.^[10]

You’ll continue on a clear liquid diet during the initial hospital stay, gradually advancing to solid foods as your condition improves. Most people stay in the hospital for a few days, though the length depends on how quickly symptoms resolve and whether any complications develop.

Treating complications of diverticulitis

When diverticulitis leads to complications, more aggressive treatment becomes necessary. If an abscess forms—a painful, swollen area filled with pus—doctors may be able to drain it using a technique called computed tomography (CT)-guided percutaneous drainage. In this procedure, a radiologist uses CT imaging to guide a needle through the skin into the abscess, allowing the pus to drain out. This approach can often resolve the problem without the need for immediate surgery.^[12]

Diverticular bleeding is another complication that requires prompt attention. When a small blood vessel in a diverticulum ruptures, it can cause bleeding from the rectum. Even if the bleeding stops on its own, you should contact your doctor immediately. In cases of significant bleeding, you may need to go to the emergency department. Doctors can locate and stop the bleeding using procedures such as colonoscopy (where a flexible tube with a camera is inserted into the colon) or angiography (a special X-ray technique that uses dye to visualize blood vessels).^[13]

About 15 to 30 percent of patients admitted to the hospital with acute diverticulitis require surgical intervention during that admission. Surgery becomes necessary when severe complications arise or when the condition doesn’t respond to medical treatment. Complications requiring surgical intervention include purulent peritonitis (infection of the abdominal cavity lining), uncontrolled sepsis (a life-threatening infection spreading through the body), fistulas, intestinal obstruction, and perforation.^[12]

Surgical options for diverticulitis

Surgery for diverticulitis typically involves removing the affected portion of the colon in a procedure called colectomy or colon resection. The goal is to remove the diseased segment and reconnect the healthy parts of the intestine so that normal bowel function can continue.^[8]

There are two main surgical approaches: open surgery and laparoscopic surgery. In open surgery, the surgeon makes a large incision in the abdomen to access the colon. In laparoscopic surgery, the surgeon makes several small incisions and uses specialized instruments and a camera to perform the operation. Studies show that laparoscopic surgery results in a shorter hospital stay, fewer complications, and lower in-hospital mortality compared with open surgery.^[10]

In some cases, particularly when there’s significant infection or the bowel has perforated, you may temporarily need a colostomy. This is a surgical opening created in the abdominal wall where a portion of the colon is brought to the surface. A bag is attached to collect stool, giving the lower part of the intestine time to heal. In many cases, the colostomy can be reversed in a later operation, restoring normal bowel function.^[5]

The decision about whether to have elective surgery after recovering from diverticulitis is complex and should be individualized. Traditional recommendations suggested elective resection after three episodes of uncomplicated diverticulitis to prevent future attacks. However, this approach has been reconsidered because most complicated diverticulitis occurs on the first presentation, not after multiple mild episodes. The decision to proceed with surgery should be based on factors including patient preference, the severity and frequency of attacks, other medical conditions present, and how the condition affects quality of life.^[12]

Follow-up after diverticulitis treatment

After successfully treating acute diverticulitis, you should be reassessed four to six weeks later. If you had complicated disease or haven’t had a recent colonoscopy, your doctor will likely recommend one at six to eight weeks after your symptoms began. This timing allows inflammation to subside, reducing the risk of complications during the procedure. The colonoscopy helps rule out other conditions, including colorectal cancer, which, while uncommon, is 40 times more likely in patients with uncomplicated diverticulitis than in the general population.^[17]

Emerging treatments and clinical research

While standard treatments for diverticulitis are well established, researchers continue to explore new approaches that might improve outcomes and reduce the need for surgery. Clinical trials are investigating various strategies to better manage this common condition.

One area of active research involves refining antibiotic use. Studies are examining which patients truly benefit from antibiotics and which can safely be managed without them. Some clinical trials are comparing different antibiotic regimens to determine the most effective combinations with the fewest side effects. This research is particularly important as medical professionals worldwide work to reduce unnecessary antibiotic use, which contributes to antibiotic resistance.^[12]

Researchers are also investigating medications that target inflammation directly. Since inflammation is a central feature of diverticulitis, drugs that can reduce inflammatory processes in the colon might help prevent flare-ups and speed healing. Some studies are examining the role of anti-inflammatory agents that work specifically in the gut without affecting the whole body.

Another promising area involves probiotics—beneficial bacteria that may help maintain a healthy balance of microorganisms in the intestines. Some research suggests that altering the microbiome (the community of bacteria and other organisms living in the gut) might reduce inflammation and prevent recurrent episodes of diverticulitis. However, the evidence is still developing, and more studies are needed to determine which probiotic strains, if any, are truly beneficial and safe for people with diverticular disease.^[13]

Genetic research is also advancing our understanding of diverticulitis. Scientists have identified at least two genes associated with the condition, including one called TNFSF15 that has been linked to diverticulitis in multiple studies. Understanding the genetic factors involved may eventually lead to personalized treatment approaches based on an individual’s genetic profile.^[15]

Clinical trials are exploring different surgical techniques and timing as well. Researchers are investigating whether certain minimally invasive procedures might prevent complications in high-risk patients before they develop. Studies are also examining the best timing for elective surgery in patients who have had repeated episodes of diverticulitis.

Lifestyle modifications to prevent recurrence

Beyond medical treatments, lifestyle changes play a crucial role in managing diverticular disease and preventing future episodes of diverticulitis. These interventions can significantly reduce your risk of flare-ups and improve your overall digestive health.

Increasing dietary fiber is one of the most important lifestyle modifications. A high-fiber diet helps soften stool and reduces pressure in the colon, which may prevent diverticula from becoming inflamed. Good sources of fiber include whole grains, fruits, vegetables, legumes, and nuts. If you’re not accustomed to eating much fiber, increase your intake gradually over several weeks while also drinking plenty of water. Too much fiber too quickly can cause gas and bloating, which might irritate your gut.^[17]

For many years, doctors advised people with diverticulosis to avoid nuts, seeds, and popcorn, believing that small particles could get stuck in diverticula and cause inflammation. However, research has disproven this theory. Studies show no higher risk of diverticulitis in people who eat these foods compared to those who don’t. In fact, these foods can help soften stool and may actually reduce the risk of flare-ups.^[16]

Regular physical activity is associated with a reduced risk of diverticulitis and diverticular bleeding. Vigorous exercise such as jogging, swimming laps, or playing sports like tennis or basketball appears particularly beneficial. Even moderate activity like brisk walking helps support a healthy digestive system by promoting regular bowel movements and maintaining healthy intestinal muscle tone.^[16]

If you smoke, quitting is strongly recommended. Smoking is associated with a higher risk of diverticular complications. Similarly, maintaining a healthy weight is important, as obesity increases the risk of diverticulitis. If you have a body mass index of 30 or higher, losing weight through a combination of healthy eating and regular exercise may help reduce your risk.^[10]

Limiting alcohol consumption is also advisable. Excessive alcohol use has been associated with an increased risk of diverticular disease and its complications. Moderation in drinking can be part of an overall healthy lifestyle that supports digestive health.

Avoiding constipation is crucial for people with diverticular disease. When you feel the urge to have a bowel movement, don’t hold it in—respond promptly. Straining during bowel movements can increase pressure on diverticula, potentially causing inflammation or infection. Drinking plenty of water, eating enough fiber, and staying physically active all help prevent constipation.^[21]

Most common treatment methods

• Dietary modifications
  • Clear liquid diet during acute flare-ups to rest the colon
  • Gradual reintroduction of solid foods, starting with low-fiber options
  • Long-term high-fiber diet including whole grains, fruits, vegetables, and legumes to prevent recurrence
  • Adequate hydration to support soft, regular bowel movements
• Antibiotic therapy
  • Oral antibiotics for some cases of uncomplicated diverticulitis, though not always necessary for mild symptoms
  • Intravenous antibiotics for severe or complicated diverticulitis in hospital settings
  • Broad-spectrum coverage targeting both gram-negative rods and anaerobic bacteria
• Pain management
  • Paracetamol (acetaminophen) as first-line pain relief
  • Antispasmodic medications to reduce intestinal cramping
  • Avoidance of NSAIDs due to risk of stomach irritation and bowel complications
• Supportive care
  • Rest to allow the digestive system to heal
  • Intravenous fluid resuscitation for severe cases
  • Bowel rest through liquid diet during acute inflammation
• Interventional procedures
  • CT-guided percutaneous drainage of abscesses to avoid immediate surgery
  • Colonoscopy with interventions to stop diverticular bleeding
  • Angiography to locate and control bleeding blood vessels
• Surgical treatment
  • Colectomy (colon resection) to remove diseased bowel segments
  • Laparoscopic surgery offering shorter hospital stays and fewer complications compared to open surgery
  • Emergency surgery for complications like perforation, uncontrolled infection, or obstruction
  • Temporary colostomy in severe cases, often reversible after healing
• Prevention strategies
  • Regular physical activity, especially vigorous exercise like jogging or swimming
  • Smoking cessation to reduce complication risk
  • Weight management for those with obesity
  • Limiting alcohol consumption
  • Avoiding constipation through fiber, fluids, and prompt response to bowel urges