The first is that the patient is prone to forming boils at the mouth of the external ear canal, which are particularly painful and sometimes break out into pus. In terms of treatment, the patient can buy Bactrim ointment and apply it to the surface of the boil, while taking oral antibiotics to reduce inflammation for three days, commonly used are cefdinir dispersible tablets or cefprozil capsules. The patient’s condition should improve significantly in about three days. In the second case, the patient’s ear sebaceous cysts are often found in young people with oily skin, and in severe cases, they may even be accompanied by infection and swelling, and often require intravenous infusion to relieve the patient’s painful symptoms.