A hard, round growth inside the earlobe may be a sebaceous cyst or keloid. 1. Sebaceous cysts: also known as comedones. When a sebaceous cyst grows inside the earlobe, if you often squeeze or touch the sebaceous cyst in the earlobe, it is easy to lead to pus infection, which makes the local area red, swollen, hot, and painful, thus making a hard lump inside the earlobe. 2. Keloid: usually occurs in people who like to have their ears pierced, this physical trauma caused by piercing the skin breakage, in the process of wound healing, the tissue appears to be hyperactive, thus making the formation of keloid in the earlobe, which is manifested in the earlobe area and touched a hard round lump. This type of keloid is not self-absorbing and can grow gradually. When there is a hard round thing growing inside the earlobe, it is recommended to go to the ear, nose and throat department of the hospital as soon as possible to clarify the cause and observe or treat according to the doctor’s instruction.