1. Before mandibular angle plastic surgery, X-rays should be taken on the frontal and lateral positions of the skull, so that doctors can accurately judge the amount of bone removal. 2. Keep a good mood, keep healthy and prevent colds before mandibular angle plastic surgery. 3. Before mandibular angle plastic surgery, all routine examinations should be done. Two weeks before the operation, you should stop taking aspirin, vitamin E and other blood-activating drugs and traditional Chinese medicine, and don't have surgery during menstruation. 4. Take a bath, wash your face and remove makeup the day before mandibular angle surgery. 5. Smoking is prohibited one week before mandibular angle surgery, and drinking is prohibited three days before surgery.

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