Diagnosis
To diagnose the underlying cause of black stool, your doctor may perform some tests, such as:
Physical examination: Your doctor may examine your abdomen for any signs of tenderness, swelling, or abnormal masses.
Blood tests: Blood tests can help determine if you have anemia, infection, or inflammation.
Stool tests: Stool tests can help detect any blood or parasites in your stool.
Endoscopy: Endoscopy is a procedure that involves inserting a flexible tube with a camera and light source into your digestive tract. It can help visualize any abnormalities in the lining of the digestive tract and take a biopsy if necessary.
