Dead skin cells are called keratinocytes. These cells are composed of the fibrous protein keratin. They are a normal part of the skin's natural renewal process and are shed from the outer layer of the skin, known as the stratum corneum.
The stratum corneum, also called the "horny layer," is made up of 15-20 layers of dead skin cells. As new skin cells are formed, the older ones move to the surface, eventually dying and being shed. This process helps to protect the skin from damage and infection.
Dead skin cells can also contribute to acne, as they can clog hair follicles along with oil and bacteria. Using facial scrubs and other skin products can help remove dead skin cells, leading to a smoother and healthier complexion.