The diagnosis of IBS-D is based on the exclusion of all other possible causes.
This article explains the causes and symptoms of IBS-D, including how this disorder is diagnosed and treated.
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How Are IBS-D Symptoms Different?

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The primary symptoms of allthree subtypes of IBSare abdominal pain or discomfort.
Some people with IBS-D will suddenly stop having diarrhea and meet the diagnostic criteria forconstipation-predominant IBS (IBS-C).
What Causes IBS-D?
All forms of IBS are thought to be due to the dysfunction of the gut-brain axis.
When the gut-brain axis is working as it should, your bowel movement and stool consistency will be normal.
They include:
How Is ISB-D Diagnosed?
However, to confirm the diagnosis, your healthcare provider will need to exclude all other possible causes.
How Is IBS-D Best Treated?
The selection of treatment is based on the severity and frequency of your symptoms.
FODMAP stands for fermentable oligosaccharides, disaccharides, monosaccharides, and polyols.
The treatment may involve a FODMAP diet and targeted drugs like Viberzi and Xifaxan.
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