Tonsil cancer is a common malignant tumor of the palatine tonsils. It is mostly seen in men over 40 years of age. The cancer mostly occurs in the upper pole of the tonsil, often with superficial ulcers, but also with infiltration, invading the soft palate via the supratentorial fossa and linguopalatine arch, and then down to the root of the tongue, and often with cervical lymph node metastasis. The pathological type can be squamous cell carcinoma, lymphoepithelial carcinoma, undifferentiated carcinoma, adenocarcinoma, etc., with squamous carcinoma being the most common. 1. Early symptoms are not obvious, only discomfort, foreign body sensation or slight pain in the throat. In late stage, it can be obvious pharyngeal pain, which is aggravated when swallowing and can be radiated to the ipsilateral ear or face. There are often symptoms such as bad breath, bleeding and difficulty in opening the mouth. 2. One side of tonsil is obviously enlarged, nodular or cauliflower-shaped, or with ulcer, necrosis and pseudomembrane on the surface. The tumor develops quickly and often invades the surrounding tissues, resulting in swallowing and breathing disorders. 3.Early stage often has cervical lymph node metastasis, appearing ipsilateral or bilateral cervical lymph enlargement, hard and fixed. The early symptoms of tonsil cancer are mild and easy to be ignored. Any patient over 40 years old with long-term throat discomfort, foreign body sensation, persistent mild sore throat and aggravated symptoms after anti-inflammatory treatment should be suspected of the possibility of tonsil cancer. Detailed examination must be conducted to make early diagnosis and early treatment. The following symptoms are the early clinical signs of tonsil cancer: 1. Foreign body sensation in the throat. It can be caused by cold and other triggering factors, and it still exists after the cold is cured. 2. Pain in the throat. At the first consultation, 65% of patients have this symptom, which starts with vague pain and discomfort with burning, and gradually affects eating, and can be radiated to the ear when serious. 3. Swelling in the pharynx. In the early stage, patients are found to have swollen exoplasm in the tonsillar area, which becomes locally hard and enlarged, or small surface ulcers occur. In the advanced stage, symptoms such as difficulty in swallowing, difficulty in breathing, and bleeding in the throat can occur. 4. Enlarged upper cervical lymph nodes. It accounts for 54%~85%. Sometimes small lesions in the tonsillar fossa are not detected, and metastasis to the upper cervical lymph nodes may occur. Early diagnosis and early treatment are important Early tumors are small and can be asymptomatic. As the tumor grows, pharyngeal discomfort, pain, reflex earache, difficulty in swallowing, bloody sputum and bad breath, and generalized malignancy may appear. Examination: One side of tonsil is seen to be enlarged and hardened, congested, and may have ulcers with pseudo-mold or bloody secretions on the surface, some of them are cauliflower-like. There are enlarged lymph nodes in the middle of the neck and under the jaw. Cytologic smear examination and tissue biopsy can confirm the diagnosis. Imaging helps to understand the extent of the tumor.