Bleeding in the stomach can show up in bowel movements.
Stools may appear dark or almost black when blood has been digested. While there are other causes of these changes, any noticeable shift in stool color or the presence of blood should be evaluated by a healthcare professional.

This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.