In order to prevent infection after mandibular angle grinding, it is best not to eat for two days after operation, mainly relying on infusion to adhere to physiological needs. After 48 hours, you can eat some liquid things, such as milk, juice and broth. After 72 hours, you can eat semi-liquid foods such as yogurt, egg soup, rotten noodle soup and porridge. I will gradually transition to a normal diet in the future, but I can't eat hard, spicy, greasy and other irritating foods for one month. The most critical next step after mandibular angle grinding is: We must pay attention to prevent infection, so as to improve the ideal effect of the operation. Just after the mandibular angle grinding operation, the change of facial width is not obvious from the appearance, because there will be a swelling period of the wound after the mandibular angle plastic surgery. Some of them will be wider. /kloc-about 0/5 days, 70% or 80% of edema basically disappears, which does not affect normal going out and working life. The residual swelling usually lasts about 3~6 months. As the swelling of mandibular angle gradually subsides, the surgical effect will gradually appear.