Head and neck cancer is malignant tumor of the head and neck, which is a relatively rare type of malignant tumor, including otorhinolaryngologic malignant tumor, thyroid tumor and oral and maxillofacial tumor. Firstly, the most common one is nasopharyngeal carcinoma of otorhinolaryngology, which is one of the most prevalent malignant tumors in China. It is followed by laryngeal cancer and paranasal sinus cancer, which are relatively uncommon. Thyroid cancer in the neck is also relatively common, accounting for about 1% of all malignant tumors in the body. The least common are oral and maxillofacial malignant tumors, which are relatively small tumors, such as oral cancer, tongue cancer, gum cancer, cheek cancer, etc. in the mouth and parotid cancer and submandibular gland cancer in the face.