A hard lump under the earlobe that hurts when pinched may be caused by sebaceous cyst with infection, enlarged lymph nodes, folliculitis and other factors. 1. Sebaceous cyst with infection: Sebaceous cysts are cysts formed when sebum secreted by sebaceous glands cannot be discharged and collects. If sebaceous cysts are secondary to infection, it may lead to localized obvious red and swollen bumps. 2. Enlarged lymph nodes: hard lumps under the ears that hurt a little when you pinch them with your hands can also be considered to be related to enlarged lymph nodes. For example, if inflammation occurs in the maxillofacial area, the lymph nodes in the corresponding area may appear reactive hyperplasia and enlargement. 3. Folliculitis: If there is a small break in the local skin, the invasion of Staphylococcus aureus into the hair follicle causes inflammation, which can also lead to localized hard bumps and pain. Hard lumps under the ear, it is recommended not to squeeze the localization, you can go to the hospital ENT department for examination, to understand the cause, but also to give targeted treatment.