Short-term radiotherapy treatment is still recommended after a sinus malignant tumor is cleanly cut to kill residual cancer cells and reduce the chance of recurrence or metastasis. Sinus malignant tumors are highly malignant cancers and surgical removal is generally recommended at an early stage. Even if the tumor visible to the naked eye is completely removed during surgery, there may still be a few residual cancer cells, etc. Therefore, it is recommended to start radiotherapy treatment about 4 weeks after sinus cancer surgery in order to completely kill the cancer cells and reduce the probability of recurrence and metastasis. In the course of treatment, it is necessary to take appropriate nutrition to strengthen the immunity of the body, reduce the irritating effect of radioactive drugs on healthy tissues and promote the recovery of the body. It is suggested that patients should take active treatment under the guidance of doctors and undergo regular checkups to avoid delaying the condition.