Wrinkles arise mainly due to the loss of water and collagen within the skin, dermal elasticity or dermal fracture, resulting in the loss of its corresponding support, localized wrinkles, such as the balloon out of air after the surface of the folds. Hyaluronic acid is currently recognized as one of the best water retention, moisturizing function of one of the substances, it is injected into the skin, filling in the skin cells and collagen, increasing the water content of the skin, play a role in filling the organization, the skin is like a balloon full of air, smooth surface, wrinkles naturally disappear. If the facial wrinkles are very shallow, belonging to small fine lines, you only need to fill in the deep or middle layer of the dermis, and the effect after filling is very good. However, as a medical operation, the surgery may bring risks, as follows: 1. It may cause bruising, redness, swelling, tenderness, hard knots and other symptoms at the injection site, which can dissipate by itself after 1-2 weeks; 2. If the blood vessels are punctured during the injection, persistent redness, swelling, heat, pain and other infectious symptoms may occur in the less severe cases; in the more severe cases, the hyaluronic acid particles enter into the skin supplying the blood vessels along with the blood circulation and there is necrosis of the skin, and if it goes to the Important organs or parts, such as brain, eyes, etc., may cause local cerebral infarction, different degrees of blindness, visual field defects, or even death and other serious consequences; 3. Uneven local injection may lead to skin lumps or unevenness.