What causes a hard lump inside the earlobe?

Sep 22, 2021 Source: Cainiu Health
Disease description:

I have developed a hard lump inside my earlobe. What causes a hard lump to form inside the earlobe?

Doctor's answer (1)
Dr. Liu Chunqing
A hard lump inside the earlobe may represent a cystic mass arising from localized tissue in the earlobe. It could also be related to prior ear piercing at that site, potentially leading to keloid formation—a progressive, raised overgrowth of scar tissue on the skin surface. If the earlobe lump becomes red and swollen, it may indicate an infection or inflammatory process.