I had rectal pain for 2 months. Colonoscopy done 1 month back and sigmoid colon polyp removed. BUT PAIN in the rectal area still persist. I have done DRE but no abnormal finding. There is no bleeding. Stool is OK. I don't know what to do. I cannot pinpoint whether it is from anal region or rectal area. But I feel it is deep inside. I feel the pain less on walking and standing whereas, The pain is felt more on sitting. Can it be a sign of colorectal cancer?