ANATOMY

Detailed explanation-1: -A scab starts to form as soon as the skin is injured. Blood platelets begin to clump together, forming a loose clot to stem the bleeding. When the clot dries, it turns into a scab. As scabs heal, they often start to itch.

Detailed explanation-2: -Scabs form as a defense against infection, blood loss, and debris. When you get a scrape or cut, platelets-or blood clot cells-will begin to clot to stop bleeding and prevent any excess fluid from flowing out. As the blood or wound dries, it forms the hard layer of a scab.

Detailed explanation-3: -Scabs usually decrease in size and fall off as the new skin under the scab is formed. During healing, a scab may accidentally get rubbed off, which causes the wound to start bleeding again. Treat the wound and protect the area so the healing process can begin again.

Detailed explanation-4: -The preferred medical term is crust or eschar, the latter being Greek for scab. The edge of an eschar can keep a wound from closing by secondary intention. And an eschar is a sign that a wound is too dry to heal as fast as possible. Having noted that, a crust is the best nature can do in many situations.