A member asked:

14 year old girl had gastroenteritis for 8 days now. black spots in her stool. she ate dragonfruit yesterday. what is the cause of black spots?

A doctor has provided 1 answer

Gastroenteritis: Dragon fruit, as you know, has small black seeds in it -- I wonder what are the 'size' of these black spots in her stool? Black stool can mean blood (when it's black like asphalt), and sometimes a medication (iron or peptobismol) can lead to dark color. 8 days seems like a long time to have gastroenteritis - I would suggest seeing a doctor to get the proper diagnosis and create the best treatment.

Answered 2/19/2016

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