The most common type of hard lump in the earlobe is when a woman has her ears pierced, which usually results in a hard lump in the earlobe due to scar growth. There are two reasons for the hard bumps, one is the individual’s body type, some people are scarred, a slight wound, the scar is very heavy, so it is easy to produce hard bumps. On the other hand, when piercing the ears, the disinfection and post-operative treatment are not particularly hygienic, resulting in infection. After the infection, the local inflammatory reaction will produce big hard bumps.