Irritable bowel syndrome
IBS is real, common and genuinely disruptive, but it does not damage the bowel and it does not lead to cancer. The diagnosis is made once the things that look like it are excluded.
Also known as: IBS · Spastic colon · Nervous stomach
Understanding irritable bowel syndrome
What IBS is
Irritable bowel syndrome is a disorder of how the gut and brain communicate. The bowel is structurally normal, but it is oversensitive and its muscular contractions are poorly coordinated, so ordinary digestion produces pain and disturbed bowel habit.
It is genuinely common, affecting a significant proportion of adults, and it is more frequent in women. The label is sometimes used dismissively, which is unfair: IBS can be seriously disabling even though nothing is structurally wrong.
Understanding irritable bowel syndrome
Symptoms
The core pattern is abdominal pain related to defecation, together with a change in the frequency or form of stool. Pain often eases after opening the bowels.
IBS is usually grouped by predominant habit: diarrhoea-predominant, constipation-predominant, or mixed, where the two alternate. Bloating, urgency, mucus in the stool and a feeling of incomplete emptying are all common. Symptoms typically fluctuate over months and years rather than progressing steadily.
Understanding irritable bowel syndrome
What triggers it
Triggers vary between individuals, and identifying your own is a large part of managing it:
- Stress and periods of poor sleep, which strongly influence gut sensitivity
- Specific foods, commonly those high in fermentable carbohydrates, known as FODMAPs
- Large or irregular meals
- Caffeine and alcohol
- An episode of gastroenteritis, which can trigger post-infectious IBS lasting months
- Hormonal changes around the menstrual cycle
Understanding irritable bowel syndrome
How it is diagnosed
IBS is diagnosed on the pattern of symptoms, using established criteria, in the absence of alarm features. It is not a diagnosis of pure exclusion, but it is one made carefully.
The purpose of testing is to exclude conditions that mimic it: coeliac disease, inflammatory bowel disease, thyroid disorders, infection, and in older patients bowel cancer. Basic blood tests, coeliac serology and a stool calprotectin test do much of this work.
A colonoscopy is not required for every patient with typical IBS. It is indicated where alarm features are present, where symptoms began after 50, or where the picture is not clear-cut, and this is exactly the judgement a specialist consultation provides.
Understanding irritable bowel syndrome
Management
IBS is managed rather than cured, and most people achieve good control by combining approaches. Diet is the foundation, and a structured low-FODMAP approach, ideally with dietetic guidance, helps a substantial proportion of people. It is designed to be temporary, with foods reintroduced systematically.
Because the gut-brain axis is central, addressing stress and sleep is not a soft add-on but a core part of treatment, and psychological therapies have good evidence in resistant cases.
- Regular meals, not skipping and not eating very late
- Soluble fibre for constipation-predominant symptoms
- Antispasmodic medication for cramping pain
- Laxatives or anti-diarrhoeal medication targeted at the predominant pattern
- Peppermint oil, which has reasonable evidence for bloating and pain
- Regular physical activity and attention to sleep
Understanding irritable bowel syndrome
The reassurance that matters
IBS does not damage the bowel, does not cause inflammation, and does not increase your risk of bowel cancer. It does not shorten life.
That reassurance is itself therapeutic, because much of the distress in IBS comes from fearing that something serious is being missed. Once the picture is confirmed, treatment can focus on quality of life rather than on worry.
Common questions
Does IBS turn into bowel cancer?
No. IBS does not damage the bowel and does not increase the risk of bowel cancer. It is a disorder of gut function, not structure.
Do I need a colonoscopy for IBS?
Not always. It is indicated when alarm features are present, when symptoms began after 50, or when the diagnosis is uncertain. Many patients with typical IBS and normal blood tests do not need one.
What is the best diet for IBS?
A structured low-FODMAP approach helps a large proportion of people, ideally supervised so foods are reintroduced properly. Regular meal timing and adequate fluid also matter.
Rectal bleeding and piles
Most rectal bleeding is piles. The danger is assuming every bleed is piles, because the exceptions are exactly the cases where waiting costs the most.
Bowel cancer
Colorectal cancer is rising in Nigeria and patients are presenting younger. It is also one of the most preventable cancers there is, provided you look before symptoms appear.
Bowel polyps
A polyp is a small growth on the bowel wall. Most are harmless, but some are the seed from which bowel cancer grows, which is why we remove them when we find them.
Talk to the unit
This page is general information, not a diagnosis. If it describes you, a short consultation decides what, if anything, you need. Call +234 707 056 6272 or message +234 707 056 6272 on WhatsApp.