Hello Doctors, from past few days I have been seeing undigested food in my stool. There are visible pieces of brown rice, pineapples, papayas and many more food bits. I have been also having mild abdominal cramps and mildly solid stool. I have the urge to pass the stool mostly though the stools does not come out. Is this IBS? Please advise. Also sometimes I see mucus and fat in my stool. Also is it advised to take a colonoscopy and endoscopy test at this age? I'm 28 years old and I'm active physically. There's is NO blood in stool but I have the above mentioned problems.