Well I gave a green stool sample and have a bacteria aeromonas hydrophila. I on cipro for 3 days. My stools turned brown and I was fei
G better. Now the are looking green again Andy stomach pains are returning. I go back to the dr again next week. Oh... I had to fly to the mainland.
Also, I do recommend seeing someone on the weight loss issue. If your consuming the same amount of calories you usually do and still seem to lose weight, that should be looked at. But if your not eating as much because of the bowel issues and losing weight, then simply eating more will resolve that.
Green stool is sometimes caused because your passing the stool too quickly and its not getting enough time to change color(To the normal brown) spasms will cause stool to move quicker than normal and to come out green. You can have stool move really fast and not be diarrhea.
What you have is very common with IBS-A or also known as spastic colon. An ultrasound will detect if you have any blocked ducts that are creating the green stool, but I bet that will come back negative. You have a common issue with spasming colon and quick moving bowel. People with constipation would pay for this issue!