Hi. Thanks for your query. Noted the history and understood the concerns. Constipation does cause fissure in ano or Hemorrhoids when of long standing duration and also hen proper care is not taken. Since you have bleeding per-rectum for the last 5 days the cause has to be found out by the following ways: Get ano-proctoscopy and per-rectal anal examination to know the exact cause an get treated accordingly. If there is no pain the obvious cause is hemorrhoids in most of the cases. If there is pain then the cause can be fissure in ano. Yes, surely you should see a Doctor. Take laxatives and stool softeners to get soft stools. Take Sitz bath in a tub with warm water. High fiber diet. Stop any anti-inflammatory medications if you are taking. Avoid the foods and beverages that cause constipation.