The cause of itchy ears may be due to eczema, mosquito bites, fungal infections or contact dermatitis. 1. Eczema: serious caused by a variety of factors, the chronic phase is dominated by moss-like changes, easy to recur. Eczema may be due to allergies, preferably in the head and face, will lead to itchy, red and swollen auricles, etc. The condition is sometimes mild and sometimes severe. 2. Mosquito bites: After being bitten by mosquitoes or other insects, the itchy feeling may occur due to the saliva of mosquitoes. Initially localized redness, later may appear bulging. 3. Fungal infection: If there is fungal infection in other parts of the body, touching the auricle after itching may cause the auricle to be infected by the fungus, which may lead to itching. 4. Contact dermatitis: If the patient wears glasses, it may be due to the oxidized rust on the legs of the glasses or unclean legs of the glasses, resulting in contact dermatitis, which leads to itching of the auricle. It is recommended that the patient go to the hospital, clear the cause of the disease after treatment, do not use drugs without authorization, so as not to cause adverse consequences.