Itching inside the ear canal is a relatively common clinical symptom, which may be caused by external ear eczema, fungal otitis externa, chronic otitis externa and so on. 1. Eczema of the outer ear: occurs in the outer ear canal, there are a variety of internal and external factors caused by the allergic reaction polymorphic dermatitis. Acute eczema, the affected area is very itchy, mostly accompanied by burning sensation, digging the ear after the outflow of yellow watery secretion, solidification of the formation of yellow scabs; subacute eczema, localized itching, oozing less than the acute stage, there are still scabs and flaking; chronic eczema, itchy external auditory canal, thickening of the skin and flaking. 2. Fungal otitis externa: the fungus invades the external auditory canal or the conditionally pathogenic fungus in the external auditory canal, reproduces in the appropriate conditions, causing inflammatory lesions of the external auditory canal. The manifestation of the external auditory canal discomfort, swelling, pain or itching, blockage, moisture in the external auditory canal. 3. Chronic otitis externa: extensive chronic inflammation of the skin or subcutaneous tissue of the external auditory canal. Chronic otitis externa often makes the patient feel itchy and uncomfortable, from time to time by a small amount of secretion outflow. It is recommended to pay attention to keep the ear canal clean and dry, and go to the hospital in time for diagnosis and treatment.