There is a hard thing in the earlobe, most commonly due to the following two reasons: First, it may be a sebaceous cyst in the earlobe, which is often referred to as a powder tumor. This is because the sebaceous glands become clogged and then have an inflammatory reaction for a long period of time, resulting in the formation of an envelope with a powdery substance growing inside. If the swelling is not very large and there is no inflammatory reaction or pain, it usually does not require special treatment. If you want to cure it, it must be surgically removed. Second, it is possible that women who wear earrings often wear earrings locally after piercing, and are stimulated by plastic or metal, or have soft tissue infection in the ear piercing, resulting in a long-term chronic inflammatory reaction.