Filling applications are one of the most used methods in the field of medical aesthetics. Hyaluronic acid is the most commonly used filler in filling applications. As our skin ages, the amount of collagen, elastin tissue and hyaluronic acid decreases. In filler applications, decreasing hyaluronic acid is injected into problematic areas under the skin with the help of small needles. Gel-like hyaluronic acid provides density by increasing the skin's water retention capacity.