Etiology External ear eczema is an allergic superficial inflammation of the auricle, external auditory canal and surrounding skin. It can be triggered by medications or other allergic stimuli, as well as by damp heat, woolen fabrics, hair spray, fish, shrimp, milk, etc. It can also be triggered by chronic pus irritation in the external ear canal. There are generally two types of eczema: acute and chronic. Performance Acute eczema is extremely itchy, accompanied by a burning sensation, mostly seen in infants and young children. The skin is erythematous or granular with small papules, which may develop into small blisters, and when they break down, they may discharge a yellow watery discharge, and the epidermis is eroded and sometimes covered with yellow scabs. If the infection is secondary to scratching, the lesions expand, the exudate increases, and small shallow ulcers may appear. In addition to itching, chronic eczema can lead to thickening of the outer ear skin, epidermal desquamation, local color deepening and surface roughness, and narrowing of the external auditory canal. If the tympanic membrane is involved, there may be mild conductive deafness and tinnitus. Treatment 1. Remove the cause and avoid allergic factors, such as pus drainage due to purulent otitis media, clean the pus from the external ear canal and apply effective drops of medicine. 2. Do not wash with soap or hot water or apply irritating drugs locally. 3.If there is dry scab, use 3% hydrogen peroxide to wash it off and then apply the above mentioned solution or ointment. 4.For chronic eczema with thickened or cracked skin, use 70% alcohol to clean the external ear canal and keep it dry. 5. For systemic treatment, take oral anti-allergy medication, 10% calcium gluconate drops, a large amount of vitamin C orally, and prednisone tablets orally.