When you get into a fight how does the skin on your nose break and begin to bleed when hit?

The skin on the nose is prone to bleeding when hit because it is a highly vascular area, meaning it has a rich supply of blood vessels. When a force is applied to the nose, the delicate skin can easily tear and the blood vessels can burst, leading to bleeding. The nose also has a high concentration of cartilage, which can break under impact and further contribute to bleeding. Additionally, the nose is located in the center of the face and is often the target of punches or other blows, making it more susceptible to injury.