Seeing blood in your stool could leave you worried with thousands of unanswered questions. Your thoughts may wander as far as having Cancer unless you understand what actually rectal bleeding is and what could be its causes.
An overview:
Blood in the stool may be of varied colors ranging from bright red to dark blood color that looks like that of coffee grounds. Quite often, blood in stool is accompanied by certain common symptoms such as abdominal pain, weakness, vomiting, breathlessness, fainting, weight loss, diarrhea, and palpitations owing to the cause of the condition. However, it is difficult to see the blood in stool through naked eyes.

Causes:
The most common causes of blood in stool are hemorrhoids or fissures.http://www.healthylivingmantra.com/2017/06/causes-treatments-blood-stool.html