Gastroenteritis is one of the places that cause bleeding in the digestive system. The most common causes are alcohol, aspirin, aspirin, and joint pain. These above substances cause acute stomach ulcers which are likely to bleed heavily. These wounds and ulcers also occur as a result of severe burns, general hemorrhagic events known as shock, acute brain injuries, cancerous conditions, or cases of long and complicated surgical procedures. Bleeding is also caused by benign and malignant tumors in the stomach.