The redness and swelling of the outer contour of the ear is mostly caused by eczema, contact dermatitis, auricular boils, etc. The treatment methods for different diseases are different, and there is no fastest way to reduce the swelling suitable for any case. 1. Eczema: you can apply local medication to relieve itching and swelling, such as glycerite lotion and zinc oxide ointment. 2. Contact dermatitis: it can be treated by applying glucocorticoid drugs locally, such as hydrocortisone butyrate cream, beclomethasone propionate ointment, mometasone furoate cream and so on. 3. Ear boils: Early on, you can apply ichthyol ointment locally; pus breakout period requires surgery to remove the pus plug, incision of the pus cavity drainage, removal of pus, but also the need to apply antibiotics for anti-infective treatment, such as cephalosporin, methicillin, sulfamethoxazole, clindamycin and so on. The redness and swelling of the outer contour of the ear may also be caused by mosquito bites and localized pressure, etc. It is necessary to actively seek medical attention to clarify the diagnosis and condition, and then follow the doctor’s instructions to standardize the use of medication and treatment.