3 doctors weighed in:
What are the possible complications of a colonoscopy?
3 doctors weighed in

Dr. Eric Kaplan
Surgery - Colorectal
1 doctor agrees
In brief: Veery rarely
Bleeding and injury to the bowel.
In experienced hands the combined risk is less than 1 %. You may have gas and bloating afterward but these should resolve quickly and you can resume normal activity and diet the next day. The risk of having an undiagnosed colon disease or cancer is greater than the risk of the procedure.

In brief: Veery rarely
Bleeding and injury to the bowel.
In experienced hands the combined risk is less than 1 %. You may have gas and bloating afterward but these should resolve quickly and you can resume normal activity and diet the next day. The risk of having an undiagnosed colon disease or cancer is greater than the risk of the procedure.
Dr. Eric Kaplan
Dr. Eric Kaplan
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Dr. Ronald Kline
Surgery - Colorectal
In brief: Several
Possible complications include: perforation, bleeding either from a tear or from a polypectomy, infection, a flare-up of diverticulitis or colitis, splenic injury from the scope pulling on the splenic ligament, gas cramps (side-effect not a true complication), flare-up of hemorrhoids.

In brief: Several
Possible complications include: perforation, bleeding either from a tear or from a polypectomy, infection, a flare-up of diverticulitis or colitis, splenic injury from the scope pulling on the splenic ligament, gas cramps (side-effect not a true complication), flare-up of hemorrhoids.
Dr. Ronald Kline
Dr. Ronald Kline
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