Wrinkles can be designated and classified in two main ways: by their origin (dynamic or static), or by their specific location on the face. Understanding these categories helps to identify the most appropriate treatment. Dynamic Wrinkles: Also known as expression lines. They form due to the repeated contraction of facial muscles (smiling, frowning) and are only visible when the face is in motion. Static Wrinkles: These are the lines and furrows that remain visible even when the face is completely relaxed. They result from the loss of collagen, elastin, and hyaluronic acid over time. Fine Lines: These are small, superficial wrinkles, usually associated with dehydration or the first signs of aging.