Sudden black, tar-like stools, medically termed melena, often signal internal bleeding in the stomach or upper intestine, according to a 2021 study. While some foods or supplements can cause temporary ...

Causes of black stool: Consuming certain dark foods, such as black licorice, blueberries, or foods with deep colouring, can temporarily darken stool (Images: Canva) A jet‑black, sticky stool that has ...

Finding your stool suddenly dark black and tar like can be deeply unsettling. Many people immediately assume it is caused by something they ate, but a drastic colour change, especially when the stool ...