Hi thanks for contacting HCM. Here according to your complaint first do your stool examination by pathologist for parasite detection like ameba or giardia like.... If stool show pus cells then it could be chronic bacterial colitis like shigellosis or salmonella infection... If above causes not present then it might be simple indestion problem..If alternate diarrhea with gas then it is functional bowel disease.... Whenever diarrhea maintain hydration. Probiotics can taken.... Fruits taken more.... Slippery elm capsule good remedy. Water more. Non veg less... Cooke oat good for healthy digestion as it contain selenium , thiamin , copper ad vitamin e and zinc.... If still problem increasing I would suggest colonoscopy for further work up