Yes, after injection, it is necessary to predict that the skin at the injection site is slightly red and swollen, which usually disappears after a few hours. A few people will have slight congestion at the injection site, but it will soon disappear. For 4 to 6 hours, it is best not to lie down to avoid the spread of Botox. Do not wash your face, make up, be curious or touch the injection site, and do not exercise within 6 hours. A professional doctor will ask you to check it again in a week. Do not massage the local area after injection, the vaccine toxin will spread. Facial massage, hot compress and rubbing are prohibited within one month after injection. Avoid eating hard-shell foods after injection; Don't eat spicy food, seafood, alcohol and tobacco for a week. Chewing weakness and soreness may occur in the early stage. Because of chewing habits, there will still be slight asymmetry on both sides after injection. A few people may not be sensitive to drugs, so the effect is not obvious, and they need to return to the clinic after 2 weeks. Botox can be recovered after face-lifting (face-lifting needle), which means that it needs to be injected again after six months in theory to maintain the effect. Some people can keep it for a long time after two or three injections. If you want to delay the recovery of masseter muscle, you should eat less hard and tough food. But clinically, we found that some people don't need to inject again after two or three times to maintain the effect, which means that the influence of Botox on Chinese characters' faces is long-term. The reason is that during the curative effect of Botox, the human body cannot overuse the masticatory muscles. If we can get rid of the habit of overusing masticatory muscles, after the curative effect of Botox, the thinner masticatory muscles will not hypertrophy and proliferate again. Don't stay up for a week after the injection, it will reduce the efficacy after getting angry.