There are many different allergic reactions that can cause itchy ears including seasonal allergies, allergic rhinitis, and reactions to specific allergens, according to WebMD and the Allergy, Asthma & Sinus Center. There are three parts of the ear that can be affected by allergies: outer, middle and inner.
Most allergic reactions happen in the middle ear because this is where the drainage tube for the ear is located, notes the Allergy, Asthma & Sinus Center. When fluid develops in this area, infections can quickly develop making ears feel itchy or simply uncomfortable. Rhinitis can also make ears itchy. It usually develops when there is an abundance of pollution in the air, a person is experiencing a great deal of stress, or there are seasonal weather changes, notes Healthline.