It is important to differentiate from auricular pseudocysts. Pseudocysts of the auricle (commonly known as auricular plasmacytochondritis) are confined cysts on the ventral side of the auricle of unknown origin, which are called pseudocysts because they do not have an epithelial layer in their walls. The diagnosis of tough solid masses in the subauricular region is mostly parotid masses, which can be divided into verrucous lesions, benign tumors and malignant tumors. 1, verrucous lesions parotid hemangioma: common in infants within 6 months of age. The masses are soft, diffuse and progressively enlarging. It may shrink after tight pressure, increase in size when the head is lowered, and recover rapidly after raising the head, and blood may be extracted by puncture. Gill slit cyst: formed by the remnant tissue of embryonic gill slit. Cysts located in the parotid region are first gill slit cysts, which occur unilaterally and can be aspirated by puncture. Gill slit cysts may become malignant. Parotid cysts: Painless masses in the parotid area, slow growing, with salivary fluid in the cavity. Eosinophilic lymphogranuloma: Most commonly seen in men aged 20-40 years, with bilateral parotid area as the prevalent site, and may be accompanied by generalized superficial lymph node enlargement. The masses are tender, the affected skin is itchy, and the eosinophils in the peripheral blood are significantly increased, up to 60%-70%. 2.Benign tumor Parotid mixed tumor: about 85% of benign tumor of parotid gland, the mass grows slowly and has a long course, the size of the mass varies, the surface is nodular and lobulated, hard, well-defined and movable. Adenolymphoma: It accounts for about 10% of parotid tumors, significantly more in males than females, about 6:1. It is more common in middle-aged and elderly people over 50 years old, mostly located in the lower posterior pole of parotid gland, with smooth surface and history of growth. Monomorphic adenoma: less common, tumor growth is slow, the volume is not large, its clinical performance is similar to that of mixed tumor. 3.Malignant tumors Primary malignant tumors: mainly epithelial tumors, including mucinous epidermis-like carcinoma, adenoid cystic carcinoma, papillary cystic adenocarcinoma, glandular blister cell carcinoma, malignant mixed tumor, squamous cell carcinoma and undifferentiated carcinoma. Mesenchymal malignant tumors are less common and include fibrosarcoma and malignant lymphoma. Malignant masses generally grow faster, have a short course, adhere to skin and surrounding tissues, often have local neurological symptoms, and when invading the facial nerve, facial paralysis of varying degrees may occur, and metastasis of cervical lymph nodes may occur, and the common metastatic sites of distant metastasis are lung, bone and brain. Metastatic carcinoma of parotid gland: It accounts for about 3% of parotid tumors. The primary foci are commonly found in eyelid, nasopharynx and cheek, while others can be found in scalp, forehead, temporal region and maxillary sinus.