Hyaluronic acid (HA), or glyoxylic acid, is a straight-chain polymer polysaccharide composed of disaccharide units (glucuronic acid-N-ethylthioglucosamine), which is a naturally occurring substance in tissues. It is a naturally occurring substance in tissues. It is widely found in vertebrate connective tissue, mucus tissue, lens of the eye, and the intercalated membrane of some bacteria. Hyaluronic acid has been discovered for more than 80 years and is widely used in orthopedics, ophthalmology, plastic surgery and other clinical departments. The reason why hyaluronic acid can be used for soft tissue fillers is its insolubility, low metabolic rate, high water absorption, high water replenishment, and the fact that it is not easily transferred in tissues. Moreover, its allergic reaction rate is extremely low (negligible) and can effectively avoid serious complications such as embolism when injected by experienced doctors, making it a safe, efficient and minimally invasive injectable cosmetic item. So hyaluronic acid can be used to fill those parts? A. Wrinkles Due to age, smoking, sleeping and other squeezing and gravity traction, will cause the collagen and elastic fibers of the dermis to reduce, causing skin relaxation, resulting in facial wrinkles, through the injection of hyaluronic acid can effectively solve a variety of wrinkles: 1, hyaluronic acid cosmetic applications for frown lines (frown lines) and crow’s feet Excessive depression of the frown lines, when injected with Botox alone, often can not get a satisfactory The effect will be better when injected with hyaluronic acid. 2. Hyaluronic acid is applied to the lines at the corners of the mouth. Although the lines produced when beating the mouth are dynamic lines, filling the sunken lines with hyaluronic acid will have a good effect. 3.Hyaluronic acid is applied to the wrinkles (nasolabial folds) The elimination of the wrinkles is the most common purpose of hyaluronic acid. According to the depth of wrinkles and nasolabial folds, the wrinkles can be made lighter or even disappear according to their depth and location. Generally speaking, human lips will shrink with age and wrinkles will appear, and the corners of the mouth will also appear sagging due to aging, hyaluronic acid filling lip augmentation has gained a certain amount of praise. Hyaluronic acid is used to fill the face, including tear trough, apple muscle and temple, which can improve the facial defects within the time of drinking a cup of coffee, and the effect is very sure. Although the development of rhinoplasty technology has reached a certain height, hyaluronic acid injection has been used for rhinoplasty since then, because hyaluronic acid rhinoplasty and chin augmentation is fast, no incision is needed, no pain and other advantages, hyaluronic acid rhinoplasty is loved by the majority of candidates. Hyaluronic acid can also be used to fill the pits of some acne scars, scars caused by trauma and surgery, and asymmetry of congenital defects, etc. Sixth, special demand for filling parts There is also an increasing demand for earlobe augmentation, sleeper augmentation, forehead augmentation, etc., and the effect is also highly praised. Precautions before and after hyaluronic acid injection: Precautions before injection: Before treatment, please keep your skin clean, and any cosmetics and skin care products need to be cleaned. It is recommended to use a cleanser to thoroughly cleanse the skin. Patients are advised to avoid menstruation and not to take anti-inflammatory drugs (such as aspirin, etc.) for 3-4 days before treatment to less, as its possible to intensify bleeding and swelling at the injection site. Precautions after injection: 1. Avoid touching the injected area within 24-48 hours after hyaluronic acid injection in order to keep the shape fixed, and do not touch the injection eye site. 2.Ice packs can be applied within 24-48 hours after the injection is completed (do not forcefully press the filler area to prevent the distribution of hyaluronic acid from being affected). 3.After the injection, avoid doing strenuous exercise within a short period of time. 4.After the injection, maintain the general basic maintenance procedures and do not massage the treatment area. 5.After the injection, avoid sauna or long time exercise in high temperature for a while. 6.If you have taken aspirin or other similar drugs, it may increase the bruising and bleeding. 7.After hyaluronic acid injection, try not to touch your lips when you eat within a week after lip augmentation, to avoid accelerating the loss of hyaluronic acid by eating too cold or too hot food. 8.The local injection site of hyaluronic acid can have local reddening, swelling and other mild reactions, which can be appropriately iced and need not be overly nervous. 9.If local skin pallor, bruising, severe pain, blurred vision, headache and other abnormal conditions occur, please contact your doctor quickly.