A hard lump on the auricle of the ear may be caused by mechanical irritation, extrusion, skin surface damage infected with bacteria and other causes of auricular pseudocysts, boils and other diseases. 1. Auricular pseudocyst: a hard lump on the auricle of the ear may be caused by mechanical stimulation, extrusion and other reasons, there will be a cyst-like bulge on the ventral side of the auricle, and the fluid may be touched, and the fluid may be withdrawn and then pressurized bandage treatment. Some patients without timely treatment can be due to fluid absorption and mechanization of the formation of hard nodules, requiring surgical excision. 2. boils: a hard lump on the auricle of the ear may be caused by a subcutaneous bacterial infection resulting in folliculitis swelling caused by boils, boils are a combination of multiple folliculitis, can be treated with topical antibiotic ointment under the guidance of a doctor, such as mupirocin ointment, erythromycin ointment and so on. Patients with a hard lump on the auricle of the ear should actively seek medical attention to clarify the diagnosis, and follow the doctor’s instructions to standardize the use of medication and treatment.