The cells in the superficial or upper layers of skin, known as the epidermis, are constantly replacing themselves. This process of renewal is basically exfoliation (shedding) of the epidermis. But the deeper layers of skin, called the dermis, do not go through this cellular turnover and so do not replace themselves.

How long does it take epidermis to grow back?

It's job is crucial: to protect you from infections and germs. Throughout your life, your skin will change constantly, for better or worse. In fact, your skin will regenerate itself approximately every 27 days.

Does epidermis regenerate if damaged?

If the skin is unable to protect against wounds, it has the ability to renew its cells and even to heal. In the case of a minor wound, only a part of the epidermis is damaged. The cells that have been destroyed are replaced by new ones which are created from the innermost layer of the epidermis.