Ive been having bowel movements with a significant amount of bright red blood for days with no pain?

Bad news/Checkup req: Painless rectal bleeding is a serious condition which requires medical examination by your doctor. Do not delay as it can be due to cancer in some cases. Most often it is a benign condition but you can not tell till your lower GI tract has been checked with an Endoscopy.

See doctor: Although it is likely from a bleeding hemorrhoid, one cannot be sure that there may be something more serious. Since this has gone on for days without improving, it is time to get examined by your doctor

Diverticulosis colon: Common causes of rectal bleeding includes Constipation , hemorrhoids, hard stools Diverticulosis although more common in patients older than 50 yrs can be the can be the cause for significant painless bleeding at younger age This should be worked up with Colonoscopy for definite diagnosis Other causes fort painless rectal bleeding include Ischemic colitis , polyps, Cancer