Itchy edges of the outer ear may be caused by insect bite dermatitis, external ear eczema, contact dermatitis and other diseases.
1. Insect bite dermatitis: this disease is mainly caused by insect bites skin allergic reaction, commonly found in lice, fleas, mosquitoes and other insects, the bite will appear red, swollen, blisters, itching and other symptoms, can be manifested as itchy ear outer ear edge.
2. Eczema of the outer ear: the etiology of this disease is not clear, research has shown that it is thought to be closely related to the allergic reaction, common allergens are milk, animal dander, pollen, cosmetics, etc., and bad ear-digging habits, otitis media stimulation and other factors also have a relationship. Typical symptoms are itching and flaking at the outer ear, so patients will feel itchy at the edge of the outer ear.
3. Contact dermatitis: the disease is caused by contact with exogenous substances that can cause contact dermatitis, such as flowers, insect hair, earrings, etc., lesions are mostly confined to the contact area, can be seen in itching, erythema and other symptoms, so when the edge of the ear itchy outer ear need to be considered as a result of contact dermatitis.
The itchy edge of the outer ear may also be caused by other reasons, it is recommended that patients go to the hospital in a timely manner to improve the relevant examination, to clarify the specific causes of targeted treatment.