What Is IBS and How Do I Know If I Have It?

Digestive problems are extremely common, but when symptoms keep coming back without a clear cause, it can feel frustrating and confusing. Many people with ongoing bloating, stomach pain, diarrhoea, or constipation eventually hear the term IBS, but are not always sure what it actually means.

Irritable Bowel Syndrome, often called IBS, is a condition that affects how the digestive system functions. It does not cause damage to the bowel itself, but it can lead to uncomfortable and disruptive symptoms that affect everyday life.

Understanding IBS, recognising the symptoms, and knowing when to seek medical advice can help you take control of your digestive health.  

What is IBS?

IBS stands for Irritable Bowel Syndrome. It is a common digestive condition that affects the large intestine.

People with IBS have a digestive system that is more sensitive and reactive than normal. The muscles and nerves in the bowel respond strongly to triggers such as certain foods, stress, or hormonal changes.

This sensitivity can lead to symptoms such as:

• Abdominal pain or cramping
• Bloating
• Excess gas
• Diarrhoea
• Constipation
• A mixture of diarrhoea and constipation
• Feeling like the bowel has not fully emptied

Symptoms can vary widely between individuals. Some people experience mild discomfort occasionally, while others have more frequent or severe flare ups.  

How common is IBS?

IBS is one of the most common digestive conditions worldwide. It is estimated that around 10 to 20 percent of adults experience IBS symptoms at some point.

Many people live with symptoms for years before seeking help, often because they assume the problem is simply part of normal digestion.

However, ongoing digestive symptoms should not be ignored, particularly if they interfere with daily life.

Common symptoms of IBS

IBS symptoms can appear in different patterns. The most common signs include:

Abdominal pain

Pain or cramping in the lower abdomen is a key symptom of IBS. The discomfort often improves after passing stool or gas.  

Bloating

Many people with IBS feel that their stomach becomes swollen or distended, especially later in the day or after eating.  

Changes in bowel habits

IBS can affect how frequently you use the toilet and what your stool looks like.

Some people experience:

• Frequent loose stools
• Sudden urgency
• Constipation
• Alternating diarrhoea and constipation  

Excess gas

Increased gas production and difficulty passing wind can contribute to bloating and discomfort.  

Feeling of incomplete emptying

You may feel like you still need to use the toilet even after a bowel movement.

Types of IBS

IBS is often grouped into different subtypes depending on bowel habits.

IBS D (diarrhoea dominant IBS)

Frequent loose stools and urgency.

IBS C (constipation dominant IBS)

Hard stools and difficulty passing bowel movements.

IBS M (mixed IBS)

Alternating diarrhoea and constipation.

Understanding which pattern you experience can help guide treatment.  

What causes IBS?

The exact cause of IBS is not fully understood, but several factors are believed to contribute.

Gut sensitivity

People with IBS often have nerves in the digestive tract that react strongly to normal digestive activity.  

Changes in gut movement

The muscles that move food through the bowel may contract too quickly or too slowly.  

Gut bacteria imbalance

Changes in the gut microbiome can affect digestion and gas production.  

Food sensitivities

Certain foods may trigger symptoms, including those high in fermentable carbohydrates.  

Stress and emotional factors

The gut and brain are closely connected. Stress, anxiety, and emotional changes can influence digestion.  

How do I know if I have IBS?

IBS is usually diagnosed based on symptoms rather than a single test. Doctors often look for a pattern of digestive symptoms that occur over time.

Typical IBS indicators include:

• Recurrent abdominal pain
• Symptoms linked to bowel movements
• Changes in stool frequency or appearance
• Symptoms lasting at least several months

However, because IBS symptoms can overlap with other digestive conditions, testing may be needed to rule out other causes.  

When symptoms may not be IBS

Although IBS is common, certain symptoms should always be investigated further.

You should seek medical advice if you experience:

• Blood in your stool
• Unexplained weight loss
• Persistent diarrhoea
• Severe abdominal pain
• Night time bowel symptoms
• Ongoing fatigue or anaemia

These symptoms may indicate other digestive conditions that require medical assessment.  

How is IBS diagnosed?

Diagnosis usually begins with a discussion of symptoms and medical history. Depending on your symptoms, investigations may include:

• Blood tests
• Stool testing
• Food intolerance testing
• Imaging or endoscopy if needed

These tests help rule out conditions such as coeliac disease, inflammatory bowel disease, infections, or malabsorption.

Can IBS be treated?

While IBS does not currently have a cure, symptoms can usually be managed effectively.

Treatment may involve:

• Identifying trigger foods
• Adjusting diet
• Managing stress
• Improving gut bacteria balance
• Medication in some cases

Many people experience significant improvement once triggers are identified and properly managed.  

How Endocare can help

If you have ongoing digestive symptoms that could be linked to IBS, specialist assessment can help provide clarity.

At Endocare, our gastroenterology team carries out comprehensive digestive evaluations to identify the underlying causes of symptoms such as bloating, diarrhoea, constipation, and abdominal pain. Testing may include stool analysis, intolerance testing, and further investigations where appropriate.

Because our services are private and Bupa approved, you can access diagnostic testing quickly and receive clear answers without long waiting times. Identifying the cause of symptoms allows you to move forward with a personalised treatment plan rather than continuing to manage symptoms without guidance.

If you think you may have IBS or have ongoing digestive symptoms, our diagnostic team can help identify the cause and guide you towards effective treatment.  

FAQ

How do I know if I have IBS or something else?

IBS is usually diagnosed based on symptoms, but testing is often used to rule out other digestive conditions.

Can IBS suddenly start?

Yes. IBS symptoms can develop at any stage of life, sometimes after infection, stress, or dietary changes.

Does IBS cause bloating every day?

Many people with IBS experience frequent bloating, especially after meals.

Is IBS dangerous?

IBS does not cause damage to the bowel, but symptoms can significantly affect quality of life.

Should I get tested for IBS?

If digestive symptoms persist for several weeks or interfere with daily life, specialist assessment can help confirm the diagnosis.