Thin upper lips can be improved by fillers such as hyaluronic acid or autologous fat. Thin upper lip is usually related to genetic factors, if it does not have much impact on the aesthetic, it can be left untreated, and can be modified through makeup techniques. If the effect on aesthetics is relatively large, and you wish to have thicker lips, you can also consider going to a professional hospital for hyaluronic acid filler or autologous fat filler to improve. Hyaluronic acid filler and autologous fat filler are currently more popular medical technology, is the appropriate amount of hyaluronic acid or autologous fat filler to the areas in need of plastic surgery, so that the local become plump. Generally, if you find a regular hospital and choose an experienced doctor to operate, you can usually achieve good results. If you choose to improve the thin upper lip through medical aesthetic methods, you must carefully choose hospitals and doctors to avoid the risk of improper operation.