In the first two days after mandibular angle plastic surgery, it is best to maintain physiological needs by infusion and not to eat. You can start eating after 48 hours, but you should first choose some liquid foods, such as milk, juice and broth. After 72 hours, you can start eating semi-liquid foods, such as egg soup and porridge. And you can eat normally after one week. In the meantime, we should pay attention to oral hygiene. Because the incision of the operation is in the oral cavity, it is necessary to ensure that you rinse your mouth in the morning, at noon and at night to maintain oral hygiene. Also pay attention not to eat spicy and hard food just after the operation, which is not conducive to the recovery of the operation and may also affect the effect of the operation.