Botox and hyaluronic acid are two very popular cosmetic injection tools. Botox is mainly used for wrinkle reduction and face slimming. Wrinkle removal is to inject into the expression muscle, such as injecting into the frown muscle to reduce frown lines (also known as Sichuan lines), injecting into the orbicularis oculi muscle to reduce crow’s feet and nasal lines, injecting into the frontalis muscle to reduce head lines and so on. It works 1-2 days after injection and lasts about half a year. Face slimming is to inject into the bite muscle, so that the contraction of the bite muscle is reduced and the tension is decreased, for the fat face caused by the bite muscle hypertrophy, the face looks smaller and more in line with the contour of the melon face. The effect of Botox face slimming appears a little later, usually taking 1 week.