Filler Injection is a method used to treat wrinkles and deep lines on the face by injecting a type of filler, Hyaluronic Acid (HA), into the skin layers that have begun to degrade and shrink with age. The filler helps smooth and tighten the skin, giving the face a more youthful appearance. Additionally, the moisture-retaining properties of the filler contribute to increasing skin hydration, making the skin more radiant and delaying the formation of future wrinkles.