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Many adults experience occasional abdominal discomfort, bloating (link to bloating & excessive gas) or changes in bowel habits at some point in life. While these symptoms are often attributed to diet, stress or ageing, they may sometimes be related to diverticular disease, a condition involving small pouches that develop within the wall of the large intestine.

Although diverticular disease was historically considered less common in Asian populations, studies have reported increasing prevalence across many newly industrialised countries in Asia over recent decades. As dietary habits, urbanisation and life expectancy continue to change, the condition is being recognised more frequently throughout the region, including the Philippines.

Many individuals remain unaware that they have diverticula until the condition is discovered during a colonoscopy or imaging study performed for unrelated reasons. While most people never develop symptoms, some experience recurrent abdominal discomfort, bowel habit changes or episodes of inflammation that may benefit from specialist assessment and treatment.

Diverticular disease is an umbrella term that includes both diverticulosis and diverticulitis (link to diverticulitis).

  • Diverticulosis– refers to the presence of small pouches (diverticula) in the colon without inflammation.
  • Diverticulitis– occurs when one or more diverticula become inflamed or infected, leading to symptoms and potential complications.

Unlike functional digestive disorders, diverticular disease involves structural changes in the colon wall and may sometimes require medical or surgical treatment.

Dr Aaron Poh

Consultant Surgeon
& Colorectal Specialist
Alpine Surgical Practice · Singapore
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Diverticular disease develops when small pouches form in the colon and may become symptomatic, inflamed or infected over time.

Diverticular Disease vs Irritable Bowel Syndrome (IBS)

Diverticular disease and irritable bowel syndrome (IBS) can both cause abdominal discomfort and bowel habit changes, but they are fundamentally different conditions.

FEATURE

DIVERTICULAR DISEASE

IBS

Underlying problem

Structural changes in the colon with diverticula formation

Functional bowel disorder

Inflammation

May occur, particularly with diverticulitis

Typically absent

Visible abnormalities

Diverticula may be seen on colonoscopy or imaging

Usually no structural abnormalities

Complications

May lead to infection, abscess, bleeding or perforation

Does not cause bowel damage

Treatment focus

Preventing complications and treating inflammation

Managing bowel sensitivity and symptoms

This distinction is important because diverticular disease, particularly when inflamed, may require antibiotics, procedures or surgery, whereas IBS is usually managed with lifestyle and symptom-based treatments.

What causes diverticular disease?

The condition develops through a combination of structural changes in the colon wall and chronic pressure within the bowel. These mechanisms contribute to the formation of diverticula and may influence whether symptoms or complications develop.

Possible contributing factors include:

  • Structural weakening of the colon wall– age-related changes may cause areas of the bowel wall to become weaker over time, allowing pouches to form
  • Chronic pressure within the colon– repeated straining during bowel movements may increase pressure inside the colon and contribute to diverticula formation
  • Low-fibre diets– insufficient fibre intake may lead to smaller, harder stools that require greater effort to pass
  • Lifestyle factors– obesity, physical inactivity and other lifestyle influences have been associated with a higher risk of diverticular disease and complications

As dietary patterns in many Asian countries become increasingly westernised, lower fibre intake and more sedentary lifestyles may contribute to the growing recognition of diverticular disease across the region.

What are the symptoms of diverticular disease?

Many people with diverticular disease have no symptoms. When symptoms do occur, they may vary depending on whether inflammation is present.

Symptoms may range from mild abdominal discomfort and bloating to severe pain and fever when inflammation develops.

Common symptoms may include:

  • Abdominal bloating or distension
  • Lower abdominal pain, often affecting the left side
  • Changes in bowel habits, including constipation (link to constipation), diarrhoea (link to diarrhoea)or alternating bowel patterns
  • Abdominal discomfort during bowel movements
  • Nausea or digestive discomfort

When diverticulitis develops, symptoms may become more pronounced and include:

  • Sudden or worsening abdominal pain
  • Fever and chills
  • Nausea and vomiting (link to nausea & vomiting)
  • More significant changes in bowel habits
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Who is at risk of diverticular disease in the Philippines?

Although diverticular disease can affect adults of different ages, certain factors may increase the likelihood of developing diverticula or experiencing complications. As life expectancy increases and lifestyle patterns evolve across the Philippines, these risk factors are becoming increasingly relevant.

These include:

  • Increasing age– age-related weakening of the colon wall may make diverticula formation more likely
  • Low dietary fibre intake– lower fibre consumption may contribute to harder stools and increased pressure within the colon
  • Chronic constipation and straining– repeated straining can increase pressure inside the bowel and promote pouch formation
  • Medication use– long-term use of certain medications, including non-steroidal anti-inflammatory drugs (NSAIDs), may increase the risk of inflammation, bleeding or complications
  • Physical inactivity– reduced exercise may contribute to slower bowel function and constipation
  • Obesity– excess body weight has been associated with a higher risk of diverticulitis and recurrent episodes
  • Smoking– smoking may increase the risk of diverticular complications and more severe disease

What are the possible complications of diverticular disease?

If diverticular disease progresses or becomes inflamed, complications may develop involving the colon and surrounding tissues. Potential complications include:

Untreated or recurrent diverticular disease may lead to infection, bleeding, bowel obstruction or perforation.
  • Diverticulitis– inflammation or infection affecting one or more diverticula
  • Abscess formation– localised collections of infection developing around inflamed diverticula
  • Perforation– a hole in the bowel wall that allows intestinal contents to leak into the abdominal cavity
  • Bowel obstruction– inflammation or scarring may narrow the bowel and impair stool passage
  • Diverticular bleeding– bleeding from blood vessels associated with diverticula, sometimes causing sudden rectal bleeding

Diverticulosis vs Diverticulitis

Many patients confuse diverticulosis and diverticulitis because both involve diverticula within the colon. However, they represent different stages of the condition.

FEATURE

DIVERTICULOSIS

DIVERTICULITIS

Diverticula present

Yes

Yes

Inflammation

No

Yes

Symptoms

Often none

Abdominal pain, fever, bowel changes

Infection

No

May occur

Antibiotics required

Usually not

Sometimes required

Surgery required

Rarely

Occasionally, in severe or recurrent cases

How is diverticular disease diagnosed in Singapore?

Because symptoms may resemble food poisoning, irritable bowel syndrome, gastritis or other digestive disorders, some patients experience delayed diagnosis before diverticular disease is eventually identified.

Assessment typically begins with a detailed review of symptoms, medical history and risk factors.

Dr Aaron Poh typically performs:

  • Clinical history review– evaluating symptom patterns, bowel habits and previous digestive conditions
  • Physical examination– assessing for abdominal tenderness, swelling or signs of inflammation
  • Blood investigations– checking for infection, inflammation or other abnormalities
  • Stool testing– helping exclude bacterial or parasitic infections that may mimic diverticular disease
  • Computed Tomography (CT) scan– commonly used to identify diverticula and assess inflammation, abscesses or complications
  • Colonoscopy– often performed after acute inflammation has resolved to evaluate the colon and exclude other conditions such as colorectal cancer

How is diverticular disease treated in Singapore?

Treatment may include dietary modification, medication or surgery depending on symptom severity and the presence of complications.

Treatment is tailored according to whether the patient has uncomplicated diverticulosis, active diverticulitis or complications requiring procedural intervention.

Lifestyle and dietary management

  • High-fibre diet– helps produce softer stools that pass more easily through the bowel
  • Adequate hydration– supports normal stool consistency and bowel function
  • Regular physical activity– helps maintain healthy bowel motility and reduce constipation

Medical treatment for diverticulitis

  • Antibiotic therapy– may be prescribed when infection is suspected or confirmed
  • Pain management– helps relieve abdominal discomfort during recovery
  • Temporary dietary modification– dietary adjustments may allow the bowel to rest during acute inflammation

Interventional and surgical treatment

  • Abscess drainage– may be required if a localised collection of infection develops
  • Colon resection surgery– removal of the affected segment of bowel may be recommended for severe, recurrent or complicated diverticulitis
  • Minimally invasive surgery– laparoscopic techniques may be appropriate in selected patients and can help facilitate recovery

Coming to Singapore for diverticular disease evaluation

For some patients from the Philippines, the challenge is not only the symptoms themselves but the uncertainty surrounding recurring abdominal discomfort, repeated episodes of suspected diverticulitis or unexplained bowel habit changes.

Many individuals receive treatment during acute flare-ups but may not undergo a comprehensive assessment to determine the extent of diverticular disease, whether complications are developing or whether another digestive condition could be contributing to their symptoms.

In Singapore, patients often seek a more coordinated evaluation where consultation, imaging studies, colonoscopy and treatment planning can be organised within a structured timeframe.

Patients travelling from the Philippines are encouraged to bring previous colonoscopy reports, CT scans, laboratory results and medication records, as these may help streamline assessment and avoid unnecessary duplication of investigations.

Planning Your Visit from the Philippines

For patients travelling from the Philippines, care at Alpine Surgical Practice can be arranged before you leave home.

Online consultation

An initial teleconsultation with Dr Aaron Poh can be scheduled prior to your trip. This allows your symptoms, medical history and any existing investigation results — such as previous CT scans, colonoscopy reports or blood tests — to be reviewed in advance, so that the most appropriate assessments can be planned ahead of your arrival. This helps make your time in Singapore more focused and efficient.

Coordination and travel support

The team at Alpine Surgical Practice is available to assist with the practical aspects of your visit, including scheduling investigations and follow-up appointments within your intended stay. Patients are encouraged to contact the clinic in advance so that arrangements can be made around your travel dates as smoothly as possible.

Your Care Experience at Alpine Surgical Practice

Recurring abdominal pain, bloating or changes in bowel habits can become frustrating, particularly when symptoms repeatedly return despite medication or dietary adjustments.

At Alpine Surgical, assessment begins with understanding your symptoms, previous episodes of diverticulitis, bowel habits and any investigations that may already have been performed.

Dr Aaron Poh carefully evaluates whether symptoms are related to uncomplicated diverticular disease, active diverticulitis or another digestive condition that may require further investigation. Where appropriate, imaging studies, colonoscopy and additional testing can be arranged to clarify the diagnosis and guide treatment decisions.

If you have been experiencing recurring abdominal pain, repeated diverticulitis attacks or persistent bowel symptoms, arranging an appointment may help provide greater diagnostic clarity and a structured long-term management plan.

Care focuses on identifying the cause of symptoms, assessing disease severity and developing an individualised treatment strategy.

Frequently Asked Questions (FAQs)

Everything you need to know about your medical journey
Many patients seek specialist assessment after recurrent abdominal pain, repeated attacks of suspected diverticulitis or ongoing uncertainty regarding the diagnosis.
Diverticulosis refers to the presence of diverticula without inflammation, whereas diverticulitis occurs when these pouches become inflamed or infected.
Yes, some patients with diverticular disease experience bloating, abdominal discomfort or bowel habit changes even when active inflammation is not present.
You should consider seeing a colorectal surgeon if you experience persistent or recurrent abdominal pain, repeated episodes of diverticulitis, rectal bleeding, ongoing changes in bowel habits or symptoms that do not improve despite treatment. Specialist assessment may also be recommended if imaging shows complications such as an abscess, fistula, bowel narrowing or recurrent inflammation. Early evaluation can help clarify the diagnosis, assess disease severity and determine whether medical management, further investigations or surgical treatment may be appropriate.
Diverticula that have already formed generally do not disappear. However, symptoms and complications can often be managed effectively through lifestyle measures, medical treatment and, when necessary, surgery.
Mild cases may improve with conservative treatment, but persistent or severe symptoms should be medically assessed to exclude complications.
During an acute flare-up, your doctor may recommend temporary dietary modifications to reduce bowel irritation. The specific diet depends on symptom severity and individual circumstances.
Following recovery, many patients are encouraged to gradually return to a balanced diet that includes adequate fibre and hydration to support bowel health.
A CT scan is commonly used when diverticulitis is suspected because it can confirm inflammation and identify complications such as abscesses or perforation.
Surgery may be considered for recurrent diverticulitis, bowel perforation, fistula formation, obstruction, abscesses that cannot be managed conservatively or other significant complications.
There is no fixed number. The decision depends on the severity of attacks, frequency of recurrence, complications and the impact on quality of life.
Recovery depends on the type of surgery performed and whether it was performed laparoscopically or as an open procedure. Your surgeon will provide individualised guidance regarding recovery timelines and activity restrictions.
Yes, some individuals experience recurrent episodes and may require ongoing monitoring or further treatment.
If it is left untreated, severe diverticulitis may lead to abscess formation, perforation, fistulas, bowel obstruction or bleeding.
Yes, diverticular bleeding occurs when blood vessels associated with diverticula rupture. It may cause sudden painless rectal bleeding ranging from small amounts of blood to more significant bleeding requiring medical assessment. Although diverticular bleeding often stops spontaneously, recurrent or heavy bleeding may require further investigation and treatment.
The duration depends on whether imaging, colonoscopy, treatment or hospitalisation is required. Many patients can complete the assessment within a relatively short visit if the condition is uncomplicated.
Many patients can travel home once symptoms stabilise and treatment is complete, although recommendations vary depending on disease severity and the type of treatment received.
While prevention is not always possible, maintaining a healthy weight, regular physical activity, adequate hydration and a fibre-rich diet may help reduce the risk of complications.

Dr Aaron Poh

Consultant Surgeon & Colorectal Specialist
Alpine Surgical Practice · Singapore
Meet our doctor

About Dr Aaron Poh

Dr Aaron Poh is a fully accredited General Surgeon with dual subspecialties in Colorectal Surgery and Trauma Surgery, recognised by Singapore’s Specialist Accreditation Board and Ministry of Health. He is the Medical Director of Alpine Surgical Practice, with clinics located at Mount Elizabeth Hospital, Parkway East Hospital, and Farrer Park Hospitals.

Dr Aaron Poh has extensive experience, having performed over 5,000 endoscopic procedures. He is a strong advocate for early detection through colonoscopy, particularly for individuals at risk of colorectal cancer. His expertise includes advanced endoscopic techniques such as Endoscopic Mucosal Resection (EMR) for complex polyps and colonic stenting for obstructed cancers, which help patients avoid major emergency surgery.

When surgery is required, he specialises in minimally invasive laparoscopic colorectal cancer surgery, offering patients faster recovery with less pain and scarring. In addition to cancer care, he manages a wide range of anal conditions including haemorrhoids, fistulas, fissures, and abscesses, providing comprehensive colorectal treatment.

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