Black poop can be caused by foods or medications. Stool may also be black becasue of blood in the digestive tract, known as melena. A small drop of red blood is usually due to minor hemorrhoids but ...

Anyone can occasionally have narrow stools. As long as bowel movements are otherwise normal, this usually isn't cause for concern. However, several possible causes of thin stools warrant attention.

Yes, it is normal for stools to sink. It can be a sign of healthy stool. Stools may float if they contain excess gas, which may occur with a high fiber diet, or if the stool contains higher fat levels ...