There are two main conditions to consider when edema appears in the ear: first, the patient’s ear may have been repeatedly squeezed, and after being subjected to external forces, the patient’s ear will become congested and edematous, and the pain will be particularly pronounced. In terms of treatment, the patient needs to apply cold compresses to the ear with ice packs, use Bactrim cream for anti-inflammation and swelling, and also take swelling and pain capsules orally, which can effectively relieve the cerebral edema. Secondly, consider that the patient is allergic to certain substances. The patient himself may be allergic and develop ear edema after being exposed to allergens. In terms of treatment, the main thing is active anti-allergy. Patients can take oral montelukast sodium tablets or ibastine tablets, and apply compound polymyxin B on the ear, which can also effectively reduce the swelling. After a week or so of active treatment, the patient’s ear edema will improve significantly.