From last some month my wife suffering from belly pain and greenish stool problem. it not happens regularly. on stool test nothing found only mucus co?

GI evaluation: If her doctor has done a thorough evaluation and ruled out other causes of the belly pain (reproductive organs, liver, gallbladder, etc), the next step could include having an evaluation from a gastroenterologist. They'd consider further testing and possibly a colonoscopy. They'd likely also discuss trying an elimination diet. Best of luck!