3 doctors weighed in:

Apart from a mass or obstruction what could cause a flat stool.

3 doctors weighed in
Dr. Donald Colantino
Internal Medicine
2 doctors agree

In brief: Flat stool

Flat stool shape may occur in people with irritable bowel syndrome and infrequently with diverticulitis possibly related to spasm. These would be temporary occurrences, and with persistently flat stools,especially if a change in the prior usual stool shapes, colonoscopy or sigmoidoscopy would be indicated to check for obstructing lesions like growths or scarring of the colon.

In brief: Flat stool

Flat stool shape may occur in people with irritable bowel syndrome and infrequently with diverticulitis possibly related to spasm. These would be temporary occurrences, and with persistently flat stools,especially if a change in the prior usual stool shapes, colonoscopy or sigmoidoscopy would be indicated to check for obstructing lesions like growths or scarring of the colon.
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