dark tarry stool 續

Last  last Saturday, I found dark tarry stool and worry about stomach bleeding which happpend to me 4 years ago. 一到周周日就去查了專科醫生, took breath test for H Polyerio and CBC blood count test. Last friday it came back all normal. And actually my stool only once looked dark and oily.

一切正常，醫生還是堅持讓我做胃鏡，需要嗎?

 

Thanks in advance.