“Turkey neck” is an unspectacular way to describe the wrinkled, sagging skin that develops on the neck, a common side effect of aging. It occurs when your neck muscles weaken, and the skin loses its elasticity. Sagging skin is a part of the natural aging process, which causes the body’s production of collagen, elastin, and hyaluronic acid to slow down. These are the main components giving skin its structure and youthful fullness. Aging can accelerate from exposure to the sun’s UV rays, air pollution, smoking, and other environmental factors.