2 doctors weighed in:

Does diarrhea occur in your small or/and large intestine?

2 doctors weighed in
Dr. Charles Cattano
Internal Medicine - Gastroenterology
1 doctor agrees

In brief: Sites of diarrhea

Both! doctors often distinguish causes of diarrhea as "secretory" or "osmotic", into which categories may fit inflammatory, ischemic, infectious, functional, malabsorption/maldigestion.
Any of these problems can be primarily small or large intestinal. A healthy, normally-motile colon can absorb up to a gallon of fluid a day, and a healthy, normally-motile small intestine can absorb twice that.

In brief: Sites of diarrhea

Both! doctors often distinguish causes of diarrhea as "secretory" or "osmotic", into which categories may fit inflammatory, ischemic, infectious, functional, malabsorption/maldigestion.
Any of these problems can be primarily small or large intestinal. A healthy, normally-motile colon can absorb up to a gallon of fluid a day, and a healthy, normally-motile small intestine can absorb twice that.
Dr. Charles Cattano
Dr. Charles Cattano
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