A hard pimple grew behind earlobe very painful how to return a responsibility

A hard lump grew behind earlobe very painful, consider is sebaceous gland cyst infection, because oneself sebaceous gland secretes exuberant, the skin is clean at ordinary times not clean earlobe place has grease to block pore, after kneading repeatedly extrusion can infect bacterium to appear local red ache, suggest to take antibiotic kind of drug treatment.