Severe bleeding, also known as hemorrhage, occurs when a significant amount of blood escapes from the circulatory system. This can happen due to injuries, such as cuts or punctures, or medical conditions that affect blood clotting. It is critical to recognize severe bleeding, as it can lead to shock or even death if not treated promptly. There are two main types of severe bleeding: arterial and venous. Arterial bleeding is characterized by bright red blood that spurts with each heartbeat, while venous bleeding involves darker blood that flows steadily. Immediate first aid, such as applying pressure, is essential to control the bleeding until professional medical help arrives.