Thank you for your question! The FacialDefy 3.0 Lite is primarily designed to support skin tightening, lifting, and collagen production. However, **unwanted facial fat loss or a sunken appearance is a possible risk with HIFU treatments**, particularly if excessive energy is applied or areas with thin facial fat are treated. Temporary redness, swelling, or tenderness may also occur. We recommend starting at the lowest intensity, following the recommended treatment guidelines, and avoiding excessive or repeated treatment. If you have a naturally slim face or are concerned about facial volume loss, please consult a qualified dermatologist before use.