I have been bleeding after bowel movements off and on for four months, I had a colonosopy done 3 years ago for bleeding but not as bad, they said it was internal hemroids and to increase fibre and water. The bleeding went away and came back about four months ago, I had a digital exam and dr didnt feel any hemroids, but gave me hydrocotisone supp. I used them off and on and they did help for a while, but bleeding came back, it seems worse when i strain from a bowel movement, I have occasional constipation and wont go for several days. I am terrified of having another colonoscopy because i had so much pain during the procedure. do you think this could be cancer or just hemroids, is it possable for hemroids to bleed off and on for four months, even after change in diet and more intake of water. Is it possable to have hemroids and the doctor not feel them. My father is 79 and was diagnosed with colon cancer this past year so I am very worried. I am a 42 year old female.