Irritable Bowel Syndrome Information
Test & Diagnosis
If you think you have IBS, seeing your doctor is the first step. IBS is generally diagnosed on the basis of a complete medical history that includes a careful description of symptoms and a physical examination.
There is no specific test for IBS, although diagnostic tests may be performed to rule out other problems. These tests may include stool sample testing, blood tests, and x rays. Typically, a doctor will perform a sigmoidoscopy, or colonoscopy, which allows the doctor to look inside the colon. This is done by inserting a small, flexible tube with a camera on the end of it through the anus. The camera then transfers the images of your colon onto a large screen for the doctor to see better.
If your test results are negative, the doctor may diagnose IBS based on your symptoms, including how often you have had abdominal pain or discomfort during the past year, when the pain starts and stops in relation to bowel function, and how your bowel frequency and stool consistency have changed. Many doctors refer to a list of specific symptoms that must be present to make a diagnosis of IBS.
Symptoms include
Abdominal pain or discomfort for at least 12 weeks out of the previous 12 months. These 12 weeks do not have to be consecutive.
The abdominal pain or discomfort has two of the following three features:
It is relieved by having a bowel movement.
When it starts, there is a change in how often you have a bowel movement.
When it starts, there is a change in the form of the stool or the way it looks.
Certain symptoms must also be present, such as
a change in frequency of bowel movements
a change in appearance of bowel movements
feelings of uncontrollable urgency to have a bowel movement
difficulty or inability to pass stool
mucus in the stool
bloating
Bleeding, fever, weight loss, and persistent severe pain are not symptoms of IBS and may indicate other problems such as inflammation, or rarely, cancer.
The following have been associated with a worsening of IBS symptoms
large meals
bloating from gas in the colon
medicines
wheat, rye, barley, chocolate, milk products, or alcohol
drinks with caffeine, such as coffee, tea, or colas
stress, conflict, or emotional upsets
Researchers have found that women with IBS may have more symptoms during their menstrual periods, suggesting that reproductive hormones can worsen IBS problems.
In addition, people with IBS frequently suffer from depression and anxiety, which can worsen symptoms. Similarly, the symptoms associated with IBS can cause a person to feel depressed and anxious.
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