Cosmetic filling refers to a non-surgical procedure that involves injecting substances into the skin to restore volume, smooth out wrinkles, and enhance facial features. Common materials used for these injections include hyaluronic acid, collagen, and fat from the patient's own body. The results are typically immediate and can last from several months to a couple of years, depending on the type of filler used. The procedure is usually quick, often taking less than an hour, and requires minimal downtime. Patients may experience some swelling or bruising at the injection sites, but these effects generally subside within a few days. Cosmetic filling is popular for enhancing areas like the lips, cheeks, and under the eyes.