What is Irritable Bowel Syndrome?
IBS is one of the most common functional gastrointestinal disorders — meaning the digestive system looks structurally normal, but does not function as it should.
Unlike inflammatory bowel disease (IBD), IBS does not cause visible damage or inflammation to the intestinal lining. Instead, it affects how the gut and brain communicate. This gut-brain interaction can lead to heightened pain sensitivity, changes in bowel patterns, and symptoms that come and go without warning.
Globally, IBS affects between 9 and 23% of the population. In Singapore, studies suggest approximately 1 in 10 people have IBS, with cases most common among individuals in their 30s and 40s, and more frequently in women than men.
Many people manage mild IBS through dietary adjustments and stress management. However, for those with more persistent or severe abdominal pain, specialist evaluation and targeted treatment can make a meaningful difference.
What Are the Types of IBS?
IBS is classified by how it affects bowel movements:
- IBS with diarrhoea (IBS-D): Stools are frequently loose or watery.
- IBS with constipation (IBS-C): Stools are typically hard, dry, or difficult to pass.
- IBS with mixed bowel habits (IBS-M): Both types of stool changes occur, sometimes alternating between them.
Understanding your IBS type helps guide the most appropriate treatment approach.
What Causes Irritable Bowel Syndrome?
The exact cause of IBS is not fully understood, but several factors are known to contribute:
| Factor | How It Contributes to IBS |
|---|---|
| Gut-Brain Communication | IBS is closely linked to disrupted signalling between the brain and digestive system. The gut may overreact to normal sensations such as gas or fullness, interpreting them as pain. |
| Intestinal Muscle Contractions | Overactive contractions can cause cramping, bloating, and loose stools, while underactive contractions slow bowel movement and may lead to constipation. |
| Nervous System Sensitivity | Some people with IBS have heightened abdominal nerve sensitivity, causing normal digestive activity to feel painful or uncomfortable. |
| Post-Infection Changes | IBS may develop after severe gastroenteritis. Post-infectious IBS and small intestinal bacterial overgrowth (SIBO) may contribute to ongoing symptoms. |
| Psychological and Lifestyle Factors | Stress, anxiety, and depression can worsen IBS symptoms. Early life stress has also been associated with a higher likelihood of developing IBS. |
Risk Factors: You may be more likely to develop IBS if you are female, under 50 years of age, have a family history of IBS, or live with anxiety, depression, or another mood disorder.
What Are the Symptoms of Irritable Bowel Syndrome?
IBS symptoms vary from person to person and may change over time. The most common include:
IBS vs IBD — What Is the Difference?
These two conditions are frequently confused. The key distinction:
| Feature | IBS | IBD |
|---|---|---|
| What it is | Functional disorder (gut works differently) | Inflammatory disorder (gut is damaged) |
| Visible damage? | No | Yes — inflammation of gut lining |
| Examples | IBS-D, IBS-C, IBS-M | Crohn’s disease, ulcerative colitis |
| Diagnosed by | Symptom criteria + exclusion testing | Colonoscopy, biopsy, imaging |
| Cancer risk? | Not increased | May be increased in some cases |
| Treatable with nerve therapy? | Yes, in selected cases | No |
If you are unsure which condition you have, a specialist assessment is the first step.
When Should You See a Specialist?
While mild IBS often improves with lifestyle changes, you should seek specialist evaluation if:
- Abdominal pain has persisted for more than a few weeks
- Pain is severe or significantly affecting your daily life or work
- You notice blood in your stool (this requires urgent review — it is not a typical IBS symptom)
- You have unexplained weight loss
- Symptoms began after age 50
- Standard dietary changes or over-the-counter medications have not helped
- You are unsure whether your symptoms are IBS or another condition
IBS symptoms overlap with several other abdominal conditions, including stomach ulcers, gallstones, diverticulitis, pelvic disorders, and gastrointestinal cancers. A thorough evaluation is needed to exclude these before a diagnosis of IBS is confirmed.
How Is Irritable Bowel Syndrome Diagnosed?
At Singapore Paincare, our team — which includes primary care doctors, pain specialists, and a gastroenterologist — evaluates each patient comprehensively using the Painostic® approach. Assessment typically includes:
- A detailed history of your symptoms, diet, and lifestyle
- A physical examination
- Blood tests and stool sample analysis to rule out infection, inflammation, or other causes
- Imaging (X-rays, ultrasound, or CT scan) where indicated
- In selected cases, colonoscopy may be recommended to exclude other conditions
Only once other causes have been ruled out can a diagnosis of IBS as a functional pain disorder be confirmed.
What Are the Treatment Options for Irritable Bowel Syndrome?
There is no single cure for IBS, but symptoms can be managed effectively with the right treatment plan. At Singapore Paincare, we use the Painostic® approach — starting with the least invasive option and building a personalised plan based on the precise nature and severity of your condition.
Dietary and Lifestyle Management
For many patients, targeted dietary changes are a meaningful first step:
- Low FODMAP diet: Reducing fermentable sugars that trigger bloating and pain
- Increasing dietary fibre: Particularly for IBS-C
- Avoiding known triggers: Such as caffeine, fatty foods, and alcohol
- Regular exercise: Supports gut motility and stress regulation
- Stress management: Adequate rest, mindfulness, and regular routines can reduce flare-up frequency
Pharmacotherapy
Medication is used to address specific IBS symptoms and the underlying nerve sensitivity:
- Nerve stabilisers and muscle relaxants target the neuropathic component of IBS pain. These are prescribed not to treat depression or anxiety, but specifically to stabilise the hypersensitive gut-brain signalling pathway.
- Newer gut-specific medications that act on receptors in the intestinal lining may be recommended for selected patients.
Our physicians tailor pharmacological treatment to your IBS subtype and symptom pattern.
Psychological Therapy
The gut-brain connection means that psychological approaches can meaningfully improve IBS outcomes:
- Cognitive Behavioural Therapy (CBT): Helps patients identify and change thought patterns and behaviours that worsen symptoms, and teaches relaxation techniques proven to reduce gut reactivity.
Other psychological support options may be recommended alongside medical treatment.
Minimally Invasive Procedures
For patients whose abdominal pain does not respond adequately to the above, targeted injection procedures can provide significant relief:
Surgery Treatment
There is no surgical treatment for IBS.
How Can I Manage IBS Symptoms Day-to-Day?
While treatment addresses the underlying condition, these strategies can help reduce flare-up frequency:
- Follow a consistent meal schedule and eat at regular times
- Try a low FODMAP diet (under dietitian guidance if possible)
- Stay well hydrated — aim for at least 8 glasses of water daily
- Exercise regularly, even light walking helps
- Prioritise quality sleep and manage stress through relaxation techniques
- Keep a symptom diary to identify your personal triggers
Only once other causes have been ruled out can a diagnosis of IBS as a functional pain disorder be confirmed.
A Message About IBS from Our Pain Specialist
IBS is often dismissed as a minor inconvenience. In reality, persistent abdominal pain, unpredictable bowel changes, and constant bloating can affect your ability to work, socialise, and sleep.
What makes IBS particularly challenging is that the pain is real — but it often does not show up on standard scans or tests. This is because IBS is a pain disorder of the nervous system, not a structural problem. Standard painkillers do not address it well.
At Singapore Paincare, our approach goes beyond symptom management. We use the Painostic® method to understand the precise nature of your pain — whether it is driven by nerve sensitivity, muscle dysfunction, gut-brain signalling, or a combination of these factors — and build a treatment plan designed for you.
If you have been living with IBS pain and have not found adequate relief, a specialist assessment may offer a clearer path forward.
