To learn how wrinkles develop, we must first discuss the skin and exactly what happens that causes wrinkles. The skin is basically made up of 3 different layers. The epidermis is the outermost layer (the one you see), the dermis is the middle layer, and the subcutaneous is the inner layer.
Early in life when you are young, the skin does an efficient job of stretching and holding in moisture. The middle layer of skin, the dermis, has an elastic quality due to fibers called elastin that help skin look and feel young. A protein found in the dermis called collagen also helps prevent wrinkles.
But over time, collagen and elastin are lost, so the skin gets thinner and has a tougher time getting enough moisture to the epidermis. At about the same time, the fat in the subcutaneous layer (which gives skin a plump, firm appearance) also begins to disappear, the epidermis begins to sag, and wrinkles form. Wrinkles are then prone to form in the face where facial muscle contractions have been repeated for over many years. |