<s>[INST] I have been getting horrible abdominal cramps off and on for a week and they last about 15 seconds. I always have to use the restroom after. My feces is a light brown color and thinner than usual. It has darkened up a little since yesterday. Is it my diet? Its kind of worrying me. [/INST] Hi. Thanks for your query. These can be due to intestinal infection or due to IBS, (Irritable Bowel Syn Chat Doctor. A course of antibiotics should be taken. IF there is no relief after 5 days, you need further investigations like:Blood for CBP, Tidal, Sugar and CreatinineUrine: routine and microscopyStool: routine, microscopy, occult blood. Ultrasonography and colonoscopy if your treating Gastroenterologist feels so. </s>