
Irritable bowel syndrome (IBS) is a chronic condition that affects the gut and can cause a wide range of symptoms, including abdominal pain, fatigue, and changes in bowel movements. IBS is characterised by disrupted communication between the gut and the brain, which can lead to uncoordinated and painful tension in the muscles of the digestive tract. While the exact cause of abdominal pain in IBS is unknown, it is believed to be related to excessive contraction of the gut muscles, which can result in cramping and discomfort. IBS can also cause constipation and diarrhoea, which may be associated with muscle cramps and spasms. The condition is more prevalent in women and individuals with a history of stress, certain food intolerances, or other chronic pain conditions.
| Characteristics | Values |
|---|---|
| IBS symptoms | Stomach pain, diarrhoea, constipation, gas, fatigue, anxiety, abdominal pain, cramping, bloating |
| IBS causes | Stress, intolerance to certain foods, severe digestive tract infection, history of abuse, anxiety, depression, PTSD, small intestinal bacterial overgrowth, abnormal functioning |
| IBS diagnosis | Detailed medical history, blood test, X-ray, colonoscopy, endoscopy, flexible sigmoidoscopy, upper endoscopy |
| IBS treatment | Dietary changes, medication, psychosocial therapy, bowel relaxants, CBT, hypnotherapy, exercise, increasing fibre intake, taking antidepressants, drinking more water, taking probiotics |
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What You'll Learn

IBS causes abdominal pain and cramping
Irritable bowel syndrome (IBS) is a gut disorder that affects how the brain and gut work together. It causes abdominal pain and cramping, as well as other symptoms such as constipation, diarrhoea, bloating, and gas. The abdominal pain and cramping associated with IBS are caused by excessive contractions of the gut muscles, which can be sped up or slowed down by the condition. This disruption to the normal rhythm of gut muscle contractions can lead to both constipation and diarrhoea at different times.
IBS is a chronic condition that can be managed by most people through changes to their diet and daily routines, as well as medication and behavioural therapy. While the exact cause of IBS is unknown, it is classified as a neurogastrointestinal disorder, indicating that it is related to problems with how the gut and brain coordinate during digestion. This communication challenge can lead to dysmotility, or difficulties with how the gut muscles contract and move food through the gastrointestinal tract.
The colon (large intestine) muscle tends to contract more in people with IBS, causing cramps and pain. This visceral hypersensitivity means that people with IBS may have extra-sensitive nerves in their gastrointestinal tract, resulting in a lower pain tolerance. In addition, research has shown that individuals with IBS may have altered bacteria in their gut, contributing to symptoms such as excessive gas.
There are several factors that can trigger IBS flare-ups, including food and drink, stress and anxiety, regular antibiotic use, and caffeine. IBS symptoms can vary in frequency, ranging from frequent occurrences to flare-ups with periods of normal bowel movements in between. During a flare-up, individuals may experience abdominal pain or cramps, usually related to the urge to defecate.
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IBS affects the gut's muscle contractions
Irritable bowel syndrome (IBS) is a gut disorder that can cause abdominal pain, fatigue, cramping, bloating, and bouts of constipation and diarrhoea, among other symptoms. It is characterised by disrupted communication between the gut and the brain, which causes alterations in the function and sensation in the gastrointestinal (GI) tract.
The colon (large intestine) muscle tends to contract more in people with IBS, and these contractions cause cramps and pain. This excessive contraction of the gut muscles may lead to lower abdominal pain and cramping. IBS is the third most common diagnosis made by general practitioners for pain and cramping in the lower abdomen.
The exact cause of IBS is unknown, but it is believed to be related to abnormal functioning rather than a tumour or infection. Researchers have found that small intestinal bacterial overgrowth and altered gut bacteria may contribute to symptoms. Additionally, people with IBS may have extra-sensitive nerves in their GI tract, leading to a lower pain tolerance. Stress has also been suggested as a possible factor, with IBS sometimes referred to as a "nervous stomach" or "anxious stomach".
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IBS can cause constipation and diarrhoea
Irritable bowel syndrome (IBS) is a gut disorder that affects how the brain and gut work together. It can cause constipation, diarrhoea, or both. IBS-C, which stands for IBS with constipation, is characterised by hard and lumpy stools. It can be challenging to distinguish from chronic idiopathic constipation, another type of functional gastrointestinal disorder. IBS-D, or IBS with diarrhoea, is characterised by loose and watery stools.
IBS-M, or mixed-type IBS, involves alternating between diarrhoea and constipation, sometimes quite quickly. Some studies have found that people with this type tend to experience more abdominal pain or discomfort than those with IBS-C or IBS-D. The abnormal bowel movements that define the kind of IBS a person has can occur frequently or during flare-ups. They may also go away, with the person experiencing normal bowel movements, before returning.
The exact cause of IBS is unknown, but it is classified as a neurogastrointestinal (GI) disorder. These conditions are related to problems with how the gut and brain coordinate to support the digestive system. Communication challenges between the brain and gut can cause dysmotility, or problems with how GI muscles contract and move food through the digestive tract. In the case of IBS, the rhythm of gut muscle contractions is disrupted, leading to constipation or diarrhoea.
While there is no cure for IBS, symptoms can be managed through medication, diet, and lifestyle changes. People with IBS may be more sensitive to gluten and lactose, as well as foods high in FODMAPs. FODMAPs are "fermentable oligosaccharides, disaccharides, monosaccharides, and polyols," types of carbohydrates that can cause inflammation or irritation in the gut. To determine the best treatment plan, it is important to speak with a healthcare provider.
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IBS symptoms can be managed through diet
Irritable bowel syndrome (IBS) is a gut disorder that can cause abdominal pain, constipation, diarrhoea, gas, and bloating. While there is no cure for IBS, symptoms can be managed through a combination of diet, lifestyle changes, and medication.
IBS is thought to be caused by disrupted communication between the gut and the brain, which affects how the muscles in the gut contract. This can lead to excessive gas, which may be caused by bacteria creating certain toxins or the patient's inability to tolerate and transport gas in their gut. The same factors that cause excessive gas can also cause bloating.
To manage IBS symptoms, doctors may recommend dietary changes, such as avoiding gluten or trying a low FODMAP diet, which eliminates certain carbohydrates that are hard to digest. Increasing fibre intake can also help with constipation, as it softens stools and makes them easier to pass. Staying hydrated by drinking 1.5 litres of fluid per day is also recommended.
In addition to diet, lifestyle changes such as managing stress through therapy or medication can help alleviate IBS symptoms. Cognitive behavioural therapy (CBT), hypnotherapy, and biofeedback are some therapy options that may be beneficial.
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IBS can be treated with medication
Irritable Bowel Syndrome (IBS) is a gut disorder that affects how the brain and gut work together. It can cause excessive gas, bloating, and bouts of constipation and/or diarrhea, among other symptoms. While there is no cure for IBS, it is a manageable condition. Most people with IBS can find a treatment plan that works for them, which may include medication.
The first step in treating IBS is to understand the condition and its symptoms. Treatment plans can then be tailored to the individual. For example, caffeine or fatty foods stimulate colonic contractions, so reducing the intake of caffeinated beverages and rich foods may help those with IBS-D. Working with a nutritionist is recommended to ensure a balanced and nutritious diet.
There are several medications that can be used to treat IBS. Smooth muscle relaxants can be used to relieve or prevent intestinal cramping. Antidiarrheal medications slow intestinal transit, reduce the frequency of bowel movements, and improve stool consistency. Medications can also be prescribed to ease constipation, such as fibre supplements and laxatives. Antidepressants may be prescribed if a patient experiences depression and anxiety alongside abdominal pain.
Therapy can also help patients manage stress, anxiety, and depression, which are conditions that contribute to IBS. Cognitive behavioural therapy (CBT), hypnotherapy, and biofeedback are some of the therapeutic approaches that may be beneficial.
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Frequently asked questions
IBS stands for Irritable Bowel Syndrome, a gut disorder that affects how the brain and gut work together.
Yes, IBS can cause abdominal pain and cramping. This is due to excessive contraction of the gut muscles, which can lead to lower abdominal pain.
Other symptoms of IBS include constipation, diarrhea, gas, bloating, and fatigue.
There is no one-size-fits-all treatment for IBS, but dietary changes, medication, and psychosocial therapy can help manage the condition.











































