Due to so much antibiotics intake stool colour can be come  as green colour . Taking of green vegetable also cause green stool. Over use of laxative can also cause green colour of stool . If any problem cause so much irritation of gall bladder then also green stool can occur. Celiac disease and ulcerative colitis like irritable bowel syndrome can also cause green stool . Take treatment as follow as Syp- Liv 52 5 ml 2 time per day for 1 month after food.