Report any signs of bleeding or bruising (such as black stools) to your doctor immediately.

He says that the amount of black stools varied.

Check for the cause of dark or black stools.

See significance of black or bloody stools if you need information to help you answer the questions below.

Blood in the stool (which appears as black, tarry stools).

Side effects of activated charcoal include constipation and black stools.

Bleeding in stool, or black stools, can be serious.

They may cause you to have a black tongue or black stools.

A number of foods and medications can turn the stool either red or black.