What is the hottest item in plastic surgery nowadays, and the natural thing that comes to mind is “micropigmentation”. The following is to tell you about one of the two hottest products of micropigmentation – hyaluronic acid. In fact, the domestic micro-plastic surgery after a well-known and harmful “OxyContin incident”, many people only to micro-plastic surgery really concerned, but after the end of this farce. Now the most popular is hyaluronic acid. First of all, what is hyaluronic acid. Hyaluronic acid is a straight-chain polymer polysaccharide composed of disaccharide units (glucuronic acid -N- ethylthioamino glucose), which is a naturally occurring substance in tissues. Hyaluronic acid exists in large quantities in the connective tissues and dermis of the human body. It is a transparent gelatinous substance with strong moisturizing properties; 1 gram of hyaluronic acid can absorb 500 C.C of water, which is equivalent to 500 times the water-absorbing capacity of glycerin. More than eighty years ago, human beings first discovered and figured out what this substance was from the cow’s eye. Subsequently, because of its biocompatibility and absorbability, hyaluronic acid has the advantages of no immune reaction as a polymer material for medicine, and the material can be broken down and absorbed by living organisms to formally enter the plastic surgery industry. So as far as the material itself is concerned, hyaluronic acid is very safe, the risk exists in the serious complications after entering the blood vessels. Nowadays, although there are more and more brands and varieties of legal hyaluronic acid products in China, there are still reports of fake hyaluronic acid causing harm to people from time to time. So I advise you not to go to beauty salons and black clinics to do micro-plastic surgery, otherwise it will really become a “dangerous plastic surgery”. So what are the most common hyaluronic acid injection sites and the problems they solve? Hyaluronic acid injection is not as safe as the beauty seekers think, non-professional doctors injected into the blood vessels by mistake, the consequences are disastrous and even irreparable. I will gradually popularize this in future articles. So for those who are about to inject hyaluronic acid or have just finished injecting, the precautions are as follows: 1, avoid touching the injected area within 24-48 hours after injecting hyaluronic acid in order to make the shape fixed, and do not touch the injected injection site. 2, after the injection is completed, the injection can be done within 24 hours after the injection is completed, and then the injected area can be removed by a professional doctor. 2.Ice compresses can be applied within 24-48 hours after the injection is completed (do not press the filled area to prevent the distribution of hyaluronic acid from being affected). 3.Avoid strenuous exercise within a short period of time after the injection. 4, Maintain the general basic maintenance program after injection and do not massage in the treatment area. 5.After the injection, avoid sauna, or doing long time exercise at high temperature for the time being. 6.If you take aspirin or other similar drugs may increase the bruising and bleeding. 7, hyaluronic acid injection lip augmentation surgery within one week after eating try not to touch the lips, to avoid eating too cold or too hot food so that hyaluronic acid loss accelerated 8, hyaluronic acid local injection site may have local redness, swelling and other minor reactions, can be appropriate ice packs, do not have to be too nervous. 9.If there are abnormal conditions such as pale skin, bruise, severe pain, blurred vision and headache, please contact your doctor quickly.