Bloody diarrhea, also known as bloody stool or rectal bleeding ... or even a super dark, tar-like color. The longer the blood sits inside the digestive tract, the darker it will be, as it spends ...
But while a small amount of mucus in your stool is common, if you see a lot of it, if it changes color, or if it looks ... and may cause symptoms such as blood in your stool, mucus in your stool ...