How is a scab formed?

A scab forms as part of the body's natural healing process after a wound occurs. When the skin is injured, platelets in the blood quickly gather at the site to start the clotting process, releasing chemicals that trigger the formation of a fibrin mesh. This mesh, along with dried blood and other components, hardens to create a protective barrier over the wound, preventing further bleeding and infection while the tissue beneath heals. As the underlying skin regenerates, the scab eventually falls off.