How your face changes over time
Your face naturally changes over time as a result of internal and external factors. Internal factors include a decrease in natural substances – such as collagen, hyaluronic acid and elastin – that provide the skin with structure and volume. External or environmental factors include sun exposure, smoking and stress.
If you look at your face, you will see it can be divided into horizontal thirds. The forehead, eyebrows and eyes form the upper face; the under-eye area, cheeks and nose form the mid-face and the lower face consists of the mouth area, lips, chin and jawline. The different areas of the face and the terms commonly used to describe them are shown below.