The painful swelling of the auricle needs to be found. There are 3 general causes: 1. The auricle and the soft tissues of the auricle are edematous and congested due to trauma and crush injury, resulting in pain. If a hematoma is produced, it is necessary to go to the hospital as soon as possible to make an incision and drainage, and take oral anti-inflammatory drugs, which require oral cephalosporins and can be healed in about 1 week. 2. Diffuse oedema of the auricle caused by mosquito bites, in this case, local wiping with iodophor is required, no special treatment is needed, and the oedema can subside in about 5 days. 3. auricular chondromyelitis, auricular chondromyelitis is a non-specific infection between the auricular cartilage and the cartilage membrane. This is a non-specific infection between the cartilage and the cartilage membrane of the ear, which is divided into purulent and non-purulent. Non-suppurative infections require local aspiration and pressure bandaging and can be healed in about 1 week. If it does not heal after 2 weeks, surgical treatment is required to remove the necrotic cartilage.