Discolored stool

Discolored stool is an abnormal change in the color of the stool. It can range from a pale yellow to a dark black or tarry color. It can develop due to changes in diet, medications, or medical conditions. The types and manifestations of discolored stool vary depending on the cause, and can include clay-colored stool, yellow stool, green stool, black stool, or red or maroon stool.