The love of beauty is common, and the use of hyaluronic acid injection to achieve the effect of wrinkle removal has been a common plastic surgery, but what are the precautions for hyaluronic acid injection? How to take care of hyaluronic acid after injection? Today, we will tell you about the types of hyaluronic acid. Hyaluronic acid for injection must be cross-linked. It is generally divided into: single-phase cross-linked and double-phase cross-linked. The types of biphasic cross-linked hyaluronic acid are roughly divided into three types, large molecule, medium molecule and small molecule, and the types should be chosen differently for different filling parts. Large molecule hyaluronic acid has the hardest texture and the longest maintenance time, and it is most suitable for facial contouring. For example, nose augmentation and chin augmentation. Medium-molecule hyaluronic acid has a slightly softer texture and is most suitable for soft tissue filling and deep wrinkles. Therefore, it is more suitable for filling tear trough, apple muscle, temple, forehead and other parts. Small molecule hyaluronic acid Small molecule hyaluronic acid is mainly used for dermal injection of the whole face, which can replenish the missing water in the dermis as well as repair the damaged skin and play a role in moisturizing and rejuvenating the skin. What about post-operative redness and swelling? Because of the high water absorption of hyaluronic acid, it is normal for swelling to occur within 3 days after injection, and the swelling period for sensitive people should be about 4-7 days. If you have just injected hyaluronic acid, do not apply hot or cold compresses without authorization, do not massage, do not touch the injection site for 6 hours, do not eat spicy and stimulating food for a week, and if there is still redness, swelling and hard nodules after two weeks, you need to go to the hospital for a face-to-face consultation with the injector. What is the problem of facial bruising after hyaluronic acid injection? Bruising after hyaluronic acid injection is a relatively common post-operative reaction. It is mainly due to the richness of blood vessels under our skin, and it is caused by touching these blood vessels when injecting. Do not apply ice or heat to the bruises, as this will affect the effect of hyaluronic acid. Generally, the bruises will disappear automatically in about 4-7 days. After playing hyaluronic acid, the absorption is too fast! There are some beauty seekers response, injected not long, hyaluronic acid will be absorbed, why will be absorbed so fast. There are mainly the following reasons. 1, the first time hyaluronic acid injection patients may be absorbed slightly faster, but the degree of absorption of the skin is limited, so after a few times of replenishment, the maintenance time will be longer. 2. It is also related to the measurement of the injection and the individual’s physique. 3. Staying up late or drinking alcohol will speed up the absorption of hyaluronic acid, and dry skin will also speed up the absorption, so the post-operative maintenance of hyaluronic acid injection is also very important. 4. There are many brands of hyaluronic acid in the market, and the absorption speed will be different for different products. 5. There is also the psychological factor, after playing, it will be accompanied by some swelling, once the swelling has subsided, you feel that the hyaluronic acid has been absorbed. Can I wear makeup immediately after I have just had hyaluronic acid injection? Within 24 hours of injection, the eye of the needle should not get wet, keep it clean and dry, and do not squeeze the injection site. Within 72 hours of injection, do not rub medicine or cosmetics on the injection site or around the eye of the needle to avoid irritating the skin, and just keep your face plain. Never face massage, laugh or cry. To avoid causing changes in the shape of the injection site. Just keep your face stiff. Within 1 week after injection, avoid eating spicy food such as chili seafood beef and mutton; don’t steam sauna, and try not to take health care drugs, aspirin or other similar blood-activating drugs. Is it normal to look unnatural after injecting hyaluronic acid? When we inject, hyaluronic acid is injected into the dermis, subcutaneous tissue or above the fascial layer of the skin, and does not act on the muscles and will not trigger abnormalities in the muscles. When using hyaluronic acid as a large area filler, for example, for the apple muscle, the decrescent line, the temple, or the chin augmentation, the patient may feel uncomfortable at first and have a foreign body sensation, not because there is a problem with the facial muscles. If there are no other abnormal symptoms, the hyaluronic acid will gradually fuse with the skin in one to two weeks and will slowly get better. Can I do strenuous exercise after hyaluronic acid? Strenuous exercise and sweating will accelerate the metabolism of hyaluronic acid. Therefore, it is recommended to wait for about 2 weeks for the hyaluronic acid to set before doing more strenuous exercises. Can I do skin care and laser skin care after hyaluronic acid injection? After playing hyaluronic acid, it is recommended to selectively perform photoelectric skin care after one month, otherwise it may cause the absorption of hyaluronic acid to accelerate, making the area where hyaluronic acid was injected to change back to its original shape quickly. Precautions for hyaluronic acid injection 1. 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 cleanser and astringent water to cleanse the skin. Use cold water to cleanse in order to shrink the pores. Patients are strongly advised not to take anti-inflammatory drugs (such as aspirin), etc. for at least 3-4 days prior to treatment. 2. Post-injection precautions: After the injection treatment, please keep your face relaxed and do not make excessive facial expressions. Please avoid contact with high heat for at least two weeks after treatment. Do not touch or massage the injection site. 3. Adverse reactions: Inflammatory skin reactions, usually accompanied by painful pressure, lasting about one week, temporary swelling of the injection site, and persistent adverse reactions, please notify the injector immediately.