The area behind the face under the ear is the parotid area, commonly known as the “cheekbone”. In some people, a lump may grow unconsciously, without pain or itching, and slowly grows larger, often unintentionally discovered when washing the face or by others. 80% of the clinical lumps in the parotid area are benign tumors, and 80% of benign tumors are mixed tumors of the parotid gland. These tumors are mostly found in young adults and grow below the earlobe, or in large cases, may extend to the neck. Most of the tumors are hard and nodular in texture and can move when pushed, while some of them are soft and cystic. If the tumor grows rapidly and does not move when pushed, the tumor is considered to be malignant (the malignancy rate is about 3-5%), which often results in symptoms such as pain or facial nerve paralysis and metastasis of the affected cervical lymph nodes. Experience tells us that mixed tumors of the parotid gland should be surgically removed early to prevent malignancy. However, the basic principle of this surgery is to remove the tumor while preserving the facial nerve intact to avoid damage to the facial palsy (distortion of the mouth and eyes). Another point to note is that the surgery should not only remove the tumor itself. For mixed tumors in the superficial lobe of parotid gland, it is tumor + superficial lobe of parotid gland excision; for mixed tumors in the deep lobe of parotid gland, it is tumor + whole parotid gland excision. This is the only way to avoid recurrence as much as possible.