Lumps under the root of the earlobe should be alerted to sebaceous cysts of the earlobe, parotid lymphoma, chronic lymphadenitis and other diseases. 1. Sebaceous cyst of earlobe: when the sebaceous gland ducts of the skin in the earlobe area are blocked, which leads to abnormal secretion of sebaceous glands, the secretion of the contents of the sebaceous glands gradually accumulates and increases in size, which leads to the formation of sebaceous cysts, which is a cystic lesion. 2. pleomorphic adenoma of parotid gland: lumps appearing below the root of the earlobe are considered to be diseases of the parotid gland itself, such as parotid gland lymphoma, the etiology of which is not yet clarified, which may lead to the appearance of tough and solid lumps in the area below the ear of the patient. 3. Chronic lymphadenitis: there are more lymphs below the earlobe root, if these lymph nodes are infected by bacteria or viruses, and the attack of inflammation of the surrounding tissues, etc., it can lead to local lymphadenitis, which can also lead to the appearance of lumps below the earlobe root. In addition, epidermal cysts of the skin of the earlobe root, lymph node tuberculosis, mastoiditis, etc. can all lead to lumps under the earlobe root, and it is necessary to go to the hospital in time to make a clear diagnosis.