If the stool is black the day after drinking, first consider whether it is related to the food consumed. For example, if you consume food such as pig’s blood, sheep’s blood or pig’s liver during the drinking process, it is normal for the stool to appear black the next day. If the stool is black, accompanied by dizziness, weakness and other discomfort, it may be due to acute gastric mucosal lesions caused by alcohol consumption, which can lead to possible gastrointestinal bleeding. It is recommended that routine blood and stool tests be performed to assess the amount of bleeding, and depending on the situation, it is best to do gastroscopy again to clarify the site of bleeding. For patients with mild symptoms, oral proton pump inhibitors, such as omeprazole enteric capsules, lansoprazole, rabeprazole, gastric mucosal protectors such as compound bismuth aluminate granules, bismuth pectin, aluminum phosphate gel, etc. If dizziness and weakness are obvious and blood loss is high, it is recommended that hospitalization for systemic treatment is best.