11. Dark blood in the stool, or black stool
It is a clear indication of internal bleeding. The type of bleeding in bowel movements will depend on the location of the bleeding. For example, when the blood appears after deposition, it indicates an anal pathology, such as hemorrhoids. When the person suffers from gastric ulcers, the bleeding is located at a higher level, as in the stomach. For that reason, will appear feces of blackish color or appearance compared to tar, sticky and with black dots, sometimes similar to coffee grounds. You may experience decay or loss of strength, tachycardia (rapid pulse) and low blood pressure (low or very low blood pressure).