Wrinkles and sagging skin appear at different layers of our skin.
Usually they are caused by the following:
1. Lack of moisture/hydration
2. Lack of collagen fibers
3. Lack of elastic fibers
4. Lack of reticular fibers
The appearance of fine lines is caused by dehydration in our epidermis (surface of the skin). It usually appears in the outer corners of our eyes, under our eyes and above the cheekbones.
The tissues, collagen fibers, elastin fibers and reticular fibers of the skin decrease gradually and form deeper wrinkles and sagging at the dermis layer.
Wrinkles and sagging are inevitable for nearly everyone. They will still develop regardless of our muscle actions or even without making any facial expressions.
Static wrinkles include lines in the corners of the mouth, marionette lines, nasolabial folds, lines across the cheeks and along the neck.
Dynamic wrinkles are formed by facial movements and include forehead wrinkles, crow’s feet wrinkles, laughing lines, eyebrow lines, nasal lines and more.
These wrinkles are formed at the dermis layer due to long-term contraction and stretching of face muscles and will gradually deepen over time.
When we are young, the high amount of collagen fibers, elastin fibers and reticular fibers in our skin allow it to return easily to its original state. Over time, the skin is less able to bounce back and potentially becomes wrinkles and sagging is noticeable at this stage.