Blood in stool could be a sign of diverticulitis (inflammation in the colon), colorectal cancer, Crohn’s disease or gastrointestinal bleeding. If the bleeding is due to NSAID use, it usually produces black, tar-colored stools. Tarry stools or [obvious] blood always need to be evaluated ASAP. On the other hand, a bit of blood on the toilet paper could be due to a hemorrhoid and isn't necessarily cause for concern if it goes away in a few days.
Arthritis Foundation National Office1355 Peachtree St NE Suite 600 Atlanta,GA 30309 Home Office 404.872.7100 Helpline 1.844.571.4357 Customer Service 800.283.7800 Arthritis Foundation is a qualified 501(c)(3) EIN 58-1341679