The operation of grinding cheekbones is to make an incision in the oral cavity to separate and expose the subperiosteal cheekbones, and chisel the cheekbones designed to be removed with special instruments before the operation. Ice compress should be done more within three days after zygomatic reduction, which is helpful to reduce swelling. Take out stitches in one week, eat liquid food about three days after zygomatic reduction, and generally recover in 15 days after zygomatic reduction. Try not to eat hard food for three months to avoid infection.