Fat injection, also known as fat grafting or lipofilling, is a cosmetic procedure in which fat is taken from one part of the body and injected into another to enhance volume and improve contours. This technique is commonly used in facial rejuvenation, breast augmentation, and body contouring. The procedure involves liposuction to harvest fat, which is then purified and injected into targeted areas that require volume restoration or reshaping. One of the main advantages of fat injection is that it uses the patient's own fat, reducing the risk of allergic reactions or complications associated with synthetic fillers. It can be used to treat wrinkles, hollows, or scars, offering a more natural look compared to synthetic options. The results are long-lasting, although some of the injected fat may be reabsorbed by the body over time, requiring touch-up procedures in some cases. Fat injection is generally safe, but like any surgery, it carries risks such as infection, asymmetry, or fat resorption. The recovery period is relatively short, with most patients returning to normal activities within a few days. However, patients are advised to avoid strenuous activities for a few weeks. Overall, fat grafting is a versatile and effective method for achieving a more youthful and contoured appearance.