What is a wrinkle?
A wrinkle is a break in the skin. It all happens at dermis level. At this depth, your skin contains:
- Collagen fibres are involved in skin density and support. They form a fibrous mesh between the different cells in your skin and diminish due to repeated facial expressions (smiling, for example) and environmental factors like the cold, the heat and injuries.
- Elastin fibres, which keep your skin soft and elastic. Their synthesis decreases with age and the elastin is replaced by inextensible collagen. This leads to sagging skin.
As you age, the amount of collagen and elastin in your dermis decreases. Your skin becomes flaccid and its reduced elasticity makes wrinkles and fine lines more noticeable. In addition, your body makes less subcutaneous connective tissue from the age of about thirty.
There is a difference between dynamic and static wrinkles:
Main causes :
In addition to biological factors (type of skin and genes), there are some external factors that can cause wrinkles to appear: