Which skin formation is described as a scab created from a mixture of blood and pus?

A scab formed from a mixture of blood and pus is known as a crust. This skin formation develops when the body is healing from an injury or infection, leading to the drying of exudate that can include blood and pus. Crusts serve as protective barriers over wounds, helping to prevent infections while the skin underneath heals.

In this context, crusts are typically associated with situations where the skin is inflamed or infected, and they can vary in color and texture based on the underlying material and the nature of the wound.

Other formations like scales, blisters, and furuncles have distinct characteristics. Scales are thin flakes of skin that can result from conditions like psoriasis and are not related to blood or pus. Blisters are fluid-filled pockets that usually arise from friction or burns and do not signify the presence of both blood and pus. Furuncles, commonly known as boils, are infections of hair follicles that may produce pus but do not describe a dried scab formation. Understanding these distinctions is key to recognizing various skin conditions and their respective healing processes.