One of most frequent reasons that women come to see their primary care physician is to discuss abdominal pain and bloating. I don’t think a day in the office goes by that I do not hear those words. Most frequently these patients have what is known as Irritable Bowel Syndrome (IBS). Not surprisingly, it is the most commonly diagnosed gastrointestinal condition, affecting 10-15% of the population.
The true definition of IBS is: a gastrointestinal syndrome of chronic abdominal pain and altered bowel habits (without other organic cause) at least 3 days per month in the last 3 months. Commonly, the abdominal pain is intermittent and described as “crampy”. Exacerbations can occur frequently and are associated with eating and times of increased stress. The abdominal pain associated with IBS can vary in intensity and location, but is often relieved with bowel movements. Other common symptoms include: bloating, gas, nausea, diarrhea and/or constipation, and feeling full quickly. “Red flag” symptoms such as anorexia, weight loss, persistent rectal bleeding, pain awakening a patient from sleep or certain lab findings (i.e. anemia) are rarely associated with IBS and should prompt a further workup for an alternative diagnosis.
Unfortunately there are no tests specific to the diagnosis of IBS. Frequently, a physician will run blood or stool tests and maybe order additional procedures such as a colonoscopy to rule out other potential causes of symptoms. If no other source is found and no “red flag” symptoms are present, a diagnosis of Irritable Bowel Syndrome is made.
There are 4 different subtypes of IBS:
- Diarrhea predominant
- Constipation predominant
- Mixed type
- Unsubtyped
Treatment options vary between the different types.
As any patient who suffers from IBS knows, making the diagnosis is only half of the battle. Treatment for this ailment takes time, patience and diligence to improve symptoms. IBS is a chronic disease, which means most patients will likely have it for life. That being said, the majority of patients will be able to control their symptoms with one or more of the treatment modalities available.
Upon diagnosis, a patient should take time to keep a log of symptoms and what the circumstances were at that time (what she ate, what she did, etc). This will help to elucidate any specific pattern or specific food that may be contributing to a patient’s pain. It has long been thought that certain foods in certain individuals can be a source of IBS symptoms. If a patient has been diagnosed with Irritable Bowel Syndrome, her first step should be to eliminate foods known for high gas production such as: beans, onions, celery, carrots, raisins, bananas, apricots, prunes, Brussels sprouts, pretzels, bagels, alcohol and caffeine. In many patients, reduction in these foods can bring around a significant improvement in abdominal pain and bloating.
If still with significant symptoms despite reduction of high gas forming foods, a patient may decide to follow a stricter approach with the low FODMAP (fermentable, oligo-, di-, and monosaccharides and polyols) diet. High FODMAP foods are poorly absorbed and are rapidly fermented in the gut causing gas and bloating. Such foods are listed below.
Oligosachharides: wheat, barley, rye, onion, leek, garlic, shallots, artichokes, beets, fennel, peas, pistachio, cashews, legumes, lentil and chick peas..
Disaccharides: lactose (milk, ice cream, yogurt)
Monosaccharides: apples, pears, mangoes, cherries, watermelon, asparagus, sugar snap peas, honey and high fructose corn syrup.
Polyols: nectarines, peaches, plums, mushrooms, cauliflower, artificially sweetened chewing gum and other sweets
Obviously this can be a very restrictive diet. If taking on a low FODMAP diet it is recommended that you do this under the guidance of a trained dietician in order to avoid over- restriction and malnutrition. Ideally a patient would be on a low FODMAP diet for 6-8 weeks at which time she would gradually re-introduce the above foods one at a time to determine which specific foods are tolerated and which are not.
Though it is thought that food allergy could possibly play a role in Irritable Bowel Syndrome, at this time there is insufficient evidence to recommend food allergy testing in patients with IBS. This is largely due to the fact that current modes of allergy testing have not been reliable in identifying affected patients.
In addition to dietary management, 20-60 minutes of moderate to vigorous exercise 5 days a week has been shown to significantly decrease symptoms of IBS. It is also important to address daily stressors through counseling and stress-reduction techniques (meditation, yoga, etc) as increased stress often leads to increased IBS symptoms.
If lifestyle interventions still fail to control symptoms, your doctor can prescribe medications specific to the patient’s symptoms. For example, anti-diarrheals in diarrhea predominant IBS, laxatives in constipation predominant IBS, antispasmodic agents, and antidepressants.
In summary, Irritable Bowel Syndrome is a very common disease affecting a large number of women. Symptoms generally consist of abdominal pain, bloating, and a change in bowel habits. In order to diagnose IBS, doctors must rule out other organic causes of gastrointestinal disease. Though it is not curable, most patients are able to control their symptoms with lifestyle changes or medications.