Reasons why wrinkles appear
Age, genes, decreased subcutaneous fat, blood circulation, sebum secretion, and moisture, along with deterioration of elastic fibers or connective tissues and muscles are the internal factors causing wrinkles whereas UV rays, cosmetics that are not suitable for the skin, smoking, alcohol, pollution, and dryness are the external ones.
When the elastic fibers and collagen are denatured, the elasticity decreases and the tissues supporting the skin weaken resulting in skin sagging. As the skin sags, wrinkles appear around the eyelids, eyebrows, nose, and corners of the mouth.