Passing a stool this morning there was blood in the toilet water, when cleaning up on the toilet paper there was a purple skin with some darker blood?

Possibilities...: Blood in stool is a warning sign. Causes of bleeding may be predictable (e.G rectal trauma, fissure, hemorrhoids with straining), but evaluation is ALWAYS appropriate. A rule of thumb (but not absolute): black stool means bleeding comes from upper GI tract; grape jelly stool from small bowel; silver stool from biliary tree; burgundy stool from right colon; red blood from left colon to anus.

Blood in stool: Your body is telling you to see your physician since this has to be checked . Most cases at your age are easily taken care of and not too serious.

Examination: You must be examined. While statistically you are most likely to have a benign condition such as a hemorrhoid, a more serious condition must be ruled out.