I have been experiencing abdominal discomfort/pain for the past two weeks. I currently take Metformin for diabetes (type II) and have frequent bowel movements which has not been abnormal, but suddenly are a very bright green color. This has not happened before. I have been on Metformin for over six monthsand sugar levels were doing well. This discoloration has never happened till two weeks ago and the abdominal pain isn t severe, but constant. Don t know if this can be a side effect of the medication or what. I ve had back pain due to a disc herniation, got injections for it and was taking Gabapentin, Tylenol 4 and Aleve at different times, but again, never this discoloration. Any suggestions would be appreciated. I have a wonderful Family Practitioner, but might have to wait to be seen,etc. so I thought I would try this website. Thank you so much.