Hyaluronic acid, also known as hyaluronic acid, is a disaccharide unit glycosaminoglycan composed of D-glucuronide and N-acetylglucosamine. If the face is filled with collagen or hyaluronic acid, often the face will have the injection needle eye, although the injection is made with a very fine needle, the needle eye heals faster, but due to the formation of the needle eye, it is still recommended not to go to sweat two days before the injection, usually two days later the problem is not too big. If you use relatively thick needles, you need to wait for three to five days for the eye of the needle to heal, and then consider the problems of steaming and bathing. For massage, it is not recommended to massage the location where the face is filled with hyaluronic acid or collagen, because the massage master is not clear about the specific location and the specific amount of filling, if you rub hard, it will make the filling material spread in the outward direction, affecting the effect of the filling, and finally it is counterproductive. If the filler is autologous fat, massage after three months after the fat becomes active, basically there is no effect.