Itching outside the ear may be caused by frostbite, eczema in the external ear canal, and non-ear diseases. 1. Frostbite: In cold winter, due to the lack of fat in the ear, if you don’t pay attention to the warmth of your head when you go out, frostbite will form in the ear, resulting in itching outside of the ear, and the itchiness will be more pronounced especially when the weather is warm. 2. Eczema of the external auditory canal: If the patient has a history of allergy, when contacting allergenic substances, or caused by heredity, chronic diseases, etc., it can lead to itching outside of the ear, and is accompanied by blisters, rashes and other symptoms. 3. Non-ear diseases: If you suffer from diabetes, uremia and other diseases, it may lead to abnormal blood sugar levels, endocrine disorders, etc., causing itchy skin outside the ears. Itchy outside of the ear, you should go to the hospital in time, after clarifying the cause of the disease, under the guidance of the doctor to carry out the appropriate treatment and therapy.