has he had pepto lately? I know that's pink. but otherwise please read this:
Generally, blood in the stool means that there is bleeding somewhere in the large intestine. The color of the blood can be an indication of where the bleeding is occurring. If the blood is bright red and "fresh" looking, the bleeding is likely occurring toward the end of the colon or in the rectum. If bleeding is occurring higher up in the colon, the blood will be dark brownish to black, referred to as tarry stools. Sometimes, the blood may not even be visible on the stool.
The most common causes of visible blood in the stools are diverticulitis and hemorrhoids. Other conditions and situations that can cause blood in the stools include:
* colon cancer
* non-cancerous growths, such as polyps
* intestinal infections (bacterial enterocolitis) that can be caused by foodborne pathogens, such as salmonella and E. coli
* inflammatory bowel disease (Crohn's disease, ulcerative colitis)
* recent trauma; for example, blood in the stools can occur after colonoscopy or flexible sigmoidoscopy examination (only lasts a day or two; is not serious)
* lack of blood flow to the intestines, resulting in bowel ischemia
* use of non-steroidal anti-inflammatory drugs (NSAIDs), such as aspirin and ibuprofen
Sometimes the stools may appear darker than normal, leading people to believe they have blood in their stools, even when blood is not present. Consuming iron supplements, blueberries, beets, blackberries, and other blue, red, purple, and black foods can cause this to occur.
also, I read that if it is colon cancer, and if you catch it soon, then there is over 90% chance of survival.so even in worse case scenario he will be okay if you catch it fast