Thank you for your question about using Bellafill to create aegyo-sal. Aegyo-sal, or the youthful, plump area under the eyes, is often achieved through the use of dermal fillers to enhance the natural fullness and create a more youthful, smiling appearance. Bellafill is a long-lasting filler that contains polymethyl methacrylate (PMMA) microspheres and bovine collagen, typically used for deeper lines and acne scars. While Bellafill offers long-term results, it is not commonly used in the delicate under-eye area due to its thicker consistency and the potential for complications in such a sensitive region. The under-eye area requires a softer, more flexible filler to ensure a natural appearance and minimize the risk of adverse effects. For creating aegyo-sal, hyaluronic acid fillers such as Restylane or Juvéderm are generally preferred. These fillers are softer, more malleable, and can be easily adjusted to achieve the desired look with a lower risk profile. If you are considering this procedure, I recommend consulting with a board-certified dermatologist or plastic surgeon who has experience with both Bellafill and hyaluronic acid fillers. They can provide personalized advice and help you choose the safest and most effective option for achieving your aesthetic goals. Best regards,