Hyaluronic acid injection is a new method to change facial contours and easily create beautiful contours through injection. Hyaluronic acid injection cosmetic method is now very prevalent due to its high safety and good results. Like Botox, hyaluronic acid injections can achieve cosmetic results with a simple injection, without surgery, and the results of the treatment are evident. Hyaluronic acid can combine naturally with skin tissues while delivering some important nutrients to the tissues without displacement of the injection site. The natural characteristics of hyaluronic acid itself can make the hyaluronic acid left in the injection site to be degraded rapidly, and it is very safe to be used for rhinoplasty and chin augmentation. Nowadays, the so-called long-lasting hyaluronic acid has appeared on the market, so how effective is it? This substance is actually the chemical composition commonly used in laboratories for gel electrophoresis → polyarylamide and water combination of water-based gel, which does not have hyaluronic acid components. The reason why it can be maintained for a longer period of time is that it is not easily absorbed by the body. If the effect is not good after the injection and you want to correct it, you have to remove it by surgery. Through the understanding of the market, the price of hyaluronic acid injection is very reasonable, and the effect is also very good.