First, what is face slimming injection? Face slimming injection, medically known as botulinum toxin type A, is a drug that acts on cholinergic motor nerve endings. It blocks the nerves and releases signals that allow the muscles to contract, thus keeping the muscles inactive for a long time. Just like bodybuilders, who exercise their muscles every day, the muscles become fat and toned. On the contrary, those who do not exercise for a long period of time will inevitably have slim and small muscles. By injecting into the biting muscle, so that the biting muscle can not exercise for a long time, the muscle size becomes smaller, the face will also change from big to small. Second, how long can face slimming injection last? After the first injection of face slimming needle, usually in about 7 days you can feel the face start to become smaller, after 3-6 months or so the effect of the drug gradually disappears, the bite muscle volume gradually recover. If you feel that the face is not favorable to the facial image after the face is small, not the result you want, it is better not to deal with it, so that the face can restore the previous contour, which is one of the major advantages of the slimming injection, reversible, unlike the surgery can not be restored to its original state. At this point, if you feel that the facial image is helped by the smaller face, and you wish to maintain the pro, you can continue with the face slimming injection. There is a certain limit when the size of the bite muscle is reduced, and the injection after the second time lies in the maintenance, and generally there will be no further face-slimming effect. Third, how is the effect of face slimming injection? Some people have very good effect of face slimming injection, while others do not, because of the difference in the thickness of biting muscle. The thicker the bite muscle, the more significant the effect. If you want to know how effective your face injection is, you can take the following three methods: 1, one is to clench your teeth and estimate the thickness and volume of the biting muscle, which is not very accurate. 2, the other is to use ultrasound to measure the thickness of the biting muscle and the volume of the biting muscle. 2, the other is to use ultrasound to measure the thickness of the bite, this method is troublesome, need to have ultrasound. 3, there is another method is to use an injection needle directly into the bite muscle, just like a needle, simple and accurate. As the biting muscle certainly exists, only the thickness is different, the injection of thin face injection will be more or less some face thinning effect, the thicker the biting muscle, the more obvious the effect. Fourth, is there any complication of face slimming injection? If not enough professional doctors inject improperly, there are slight complications. However, these complications will disappear on their own as the effect of the medicine fades. So be sure to find a professional doctor to inject face slimming injection! Fifth, how to prevent the complications of face slimming injection? The complications of face-slimming injection are mainly due to the drug conduction to places that should not be blocked. 1, the emergence of this problem currently occupies the first place is the informal manufacturers of botulinum toxin, these products are not standardized dosage, the drug dispersion range is wide, the scope of action can not be controlled, is the most common culprit. 2, the second is the injection problem, the injection range beyond the normal, these also often occur in the absence of formal training of doctors. 3, Third is the dilution of the drug, where too much diluted water is used for the same dose of drug, resulting in a wide range of penetration to the outside.