The inexplicable swelling of the earlobe is a relatively common symptom in clinical practice, and its causes generally include the following aspects: In the first case, the swelling of the earlobe may be due to edematous swelling of the earlobe caused by the obstruction of blood flow due to local blood circulation disorders during sleep or some special positions. In this case, the swollen earlobe will gradually return to its normal state through local massage or a change in posture. In the second case, the swollen earlobe may be caused by inflammation of the earlobe or an earlobe cyst, which may be caused by a local inflammatory reaction caused by bacterial infection, resulting in redness and swelling of the earlobe and even significant pain. In this case, local iodophor disinfection should be carried out for the cause, and if necessary, some erythromycin ointment or Bactrim ointment can be applied to gradually reduce inflammation and swelling.