Why does stool turn black after drinking red wine?
Disease description:
Yesterday, after drinking red wine with friends, I noticed that my stool was black. Why does drinking red wine cause black stool?
Doctor's answer (2)
Dr. Lu Chaohui
Black stools after drinking red wine are most likely due to the pigment in the wine darkening stool color. However, this symptom may also indicate underlying gastrointestinal issues—such as gastric pain or upper gastrointestinal bleeding—that warrant medical attention. When black stools occur, it is essential first to monitor for other associated symptoms (e.g., abdominal pain, dizziness, fatigue, or vomiting). In daily life, maintain a light, easily digestible diet and avoid excessive alcohol consumption.
