For large face beauty seekers, face slimming injection can be said to be a beauty artifact for fast face slimming. Some large face beauty seekers after injection, the face becomes smaller, facial natural, face value improved a lot, but there are also injected after the adverse reaction of facial stiffness, why is it? Botulinum toxin injection expression stiffness factors 1, Botulinum toxin dispersion radius Although Botulinum toxin is powerful, but remember, Botulinum toxin dispersion radius must be the smaller the better, the smaller the radius of dispersion, the injection will be more accurate, after playing the condition of the face will not be stiff; dispersion radius is bigger, the more inaccurate the injection. In order to pursue a more natural effect and avoid excessive dispersion of botulinum toxin, try not to lie down within 4 hours after injection, and do not rub the injection site vigorously within 3 days. 2, whether the injection position is accurate When injecting Botox, the doctor will design the location of the injection point according to the facial situation, the distance between the point and the point is definitely a test of the doctor’s skills, there is any point of position deviation, there is a high probability of damage to the facial nerves, as well as the impact of the facial expression of the situation. 3, the amount of Botox injection If the amount of Botox injection is too much (the total amount of Botox injection on both sides of the left and right face is more than 200 units), or the interval between two injections is less than 1 month, the same will also appear to affect the sequelae of facial expression. The point is, Botox is not the same as hyaluronic acid, there is no dissolvable enzyme and detoxifier such a powerful magic weapon can be used, in case of overdose, playing bias, playing bad, you can only wait for it to be metabolized naturally after a few months. …… The key point is that improper selection of drug materials, injection position and level deviation, over injection, etc., any one of the problems may appear to affect the embarrassing situation of facial expression …… Although the injection of Botox is a very common plastic surgery program, but no matter how small the plastic surgery program, you must find a reliable hospital and technically mature doctors.