<s>[INST] I have pressure in my rectum.  It comes and goes, I have had colonoscopy 17months ago everything was normal. I have had diarea off and on for several months now.  Just started taking psylium the last several days it has helped, but today unbearable pressure and pain.  Can't feel any hemrroids, not painful when I try to see or feel.  What should I do it is the weekend.  I did make a appt. with GI Dr. would he be the right one or a specialist in this area?  Please help! [/INST] Hi and welcomet to HCM. YOu should consult proctologist. The most anorectal disoredrs are caused by hemorrhoids, fissurae, poylps or abssceses. Some more serious diagnosis such as cancer, crohn and ulceratice colitis should always be ruled out. YOur problem can be casued by hard stool as well. You should try to take some laxatives to see will it be better. Specialist should do examinations, at least rectoscopy and digitorectal exam. There can be some organic lesion but also he can find weakness of anal sfincters. If you see blood in stool, have opstiptaion for more than 2 days or abdominal distension you should go to emergency department. WIsh you good health. </s>