The common clinical causes of a hard lump above the ear include keloid, sebaceous cyst, and auricular pseudocyst. 1. Keloid: This condition is also known as connective tissue hyperplasia, which refers to pathological scar tissue secondary to skin trauma or spontaneous formation of overgrowth, usually associated with skin trauma, postoperative complications and other factors, the clinical manifestation of the swelling above the surface of the skin or cord. 2. Sebaceous cysts: This disease refers to the retention cysts formed due to the blockage of sebaceous gland ducts in the skin, resulting in the gradual stagnation of sebum, mostly seen in the head, face, back and buttocks and other parts of the body. Sebaceous cysts are usually single, rarely multiple, round in shape and moderately hard or elastic, with clear borders. 3. Pseudocyst of the auricle: this disease refers to the cyst-like elevation of the outer side of the auricle, which contains plasma exudate, usually associated with trauma or mechanical stimulation and other factors, the clinical manifestations of the outer side of the auricle with localized elevation, distension, fluctuating sensation, itching and so on. If there is a hard lump on the ear, it is recommended to actively seek medical treatment and choose standardized treatment after a clear diagnosis.