I found bloody mucus from anus followed by gas it was dark red mucus ihad a colonscopy 9moths before due to same prob and result were internal piles?

Maybe not hemorrhoid: Are you sure you have just hemorrhoids? Pain +/- pruritis (itching) from the rectum that recurs may also indicate anal fissures, proctitis (due to infection, inflammatory bowel disease, radiation therapy, stercoral ulcers, rectal prolapse, trauma, etc.), prctalgia fugax. Depending on your age, risk factors, current medication (aspirin, nsaid's), circumstances, please seek evaluation to be certain.