i have blood in my stool just now, red blood with mucus. loose stool. last september i had passed out big bowl of blood, so i went to see a specialist and did a colonoscopy, doctor said no polyp, no ulcer, nothing, no heamorrhoid (external & internal) too. but i can feel the swollen vein near my rectum. may i know if i shoud visit the specialist and do a colonoscopy again? Thank you.