A hard bag grows at the root of the ear and is painful to press. Clinically, it is mainly seen in the following cases: 1. Some patients have sebaceous cyst infection at the root of the ear. This is mainly due to the blocked secretion of the sebaceous glands and the repeated accumulation of secretions in the glands, resulting in the expansion of the cystic epithelium and the formation of sebaceous cysts. Generally this localized infection can lead to pain once it develops further and can form an abscess with associated changes such as rupture and pus flow. This is often required for active anti-inflammatory treatment and, if necessary, surgical incision and drainage. 2. Some patients have parotid gland diseases, because this part also belongs to the parotid gland, some patients have parotid gland inflammatory infections, or parotid gland local abscesses and other related inflammatory diseases, can also appear this hard pack pressure pain performance. 3. Some patients have this part of the lymph node Inflammatory infection. Once the inflammatory infection involves the lymph nodes and leads to inflammation of the lymph nodes, local painful pressure can occur. All in all, if a patient has a painful pressure on a hard bag at the root of the ear, it is recommended to improve the ultrasound examination to determine roughly what type it is, and if necessary, to improve the CT and other further comprehensive judgment treatment.