Understanding Diverticular Disease: What You Need to Know

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Dr. Sofie Desforges-Bell, ND | C’est La Vie Wellness, Oakville + Mitchell

Understanding Diverticular Disease: What You Need to Know

What Is Diverticular Disease?

Diverticular disease is more common than many people realize, and a diagnosis doesn’t have to be alarming. At its core, diverticular disease involves small pouches — called diverticula — that form in weak spots along the wall of the colon. These pouches develop when pressure inside the colon pushes the inner lining outward, typically at points where blood vessels enter the colon wall.

The most common location for these pouches to form is in the sigmoid colon — the lower portion of the large intestine. This area tends to be a high-pressure zone because it’s a narrowed point where stool is more formed and the colon must generate stronger contractions to move waste through.

Diverticulosis vs. Diverticulitis: What’s the Difference?

Precision in terminology matters when it comes to this condition:

  • Diverticulosis refers simply to the presence of these pouches. Many people have diverticulosis and never experience any symptoms at all.
  • Diverticulitis occurs when one or more of these pouches becomes inflamed or infected, which can cause pain, fever, and digestive changes.

Understanding where you fall on this spectrum is key to getting the right care.

What Causes It?

The development of diverticular disease is multifactorial. Research increasingly points to several contributing factors:

  • Microbiome changes in the gut
  • Low-grade inflammation
  • Colonic dysmotility (irregular movement of the colon)
  • Genetics, which appear to play a role in roughly 50% of cases

High-risk factors that can worsen the condition or increase the likelihood of complications include obesity, smoking, use of NSAIDs, and immunosuppression.

Common Myths — Busted

Myth #1: You need antibiotics every time.
Not true. For uncomplicated diverticular disease, antibiotics are not always necessary. Mild cases often resolve on their own, and the goal is to avoid unnecessary medications.

Myth #2: You can never eat nuts or seeds again.
This outdated advice has been debunked. Nuts and seeds are actually considered safe for people with diverticular disease.

Myth #3: Surgery is inevitable.
Surgery is only recommended in specific situations — such as complications, persistent symptoms that significantly affect quality of life, or recurrent episodes despite preventive efforts. It is not an automatic recommendation even after two episodes.

Myth #4: Fibre is a cure-all.
While fibre may help prevent progression of the disease, it is not a complete solution on its own.

How Is It Managed?

Management of diverticular disease should be individualized based on the severity of the condition, any complications present, and the patient’s unique health profile. Key principles include:

  • Avoiding reflexive antibiotic use for uncomplicated cases
  • Lifestyle modifications such as maintaining a healthy weight, quitting smoking, and avoiding NSAIDs when possible
  • Thoughtful use of imaging and lab tests to guide diagnosis and treatment
  • Shared decision-making between patient and provider

The Bottom Line: Risk, Reassurance, and Rational Management

A diverticulosis diagnosis is not a crisis. Most people with diverticulosis remain asymptomatic, and progression to serious complications is uncommon. With the right lifestyle changes and a personalized care plan, many patients can manage this condition effectively and live well.

If you’re experiencing symptoms or have been recently diagnosed, the most important step is to work with a knowledgeable healthcare provider who can help you navigate your options — without unnecessary restrictions or treatments.

Have questions about diverticular disease? Reach out to Dr. Sofie, ND to discuss what management strategy is right for you.

Dr. Sofie Desforges-Bell, ND

📍 C’est La Vie Wellness | Oakville & Mitchell