Frequent itching in the ear may be caused by chronic diffuse otitis externa, external ear eczema and other diseases. 1. Chronic diffuse otitis externa: the occurrence of this disease is related to factors such as decreased resistance of the skin of the external ear canal, pathogenic microbial infections, fluid accumulation in the ear canal, hot and humid relief, and trauma to the skin of the ear canal. The common symptoms are edema and pain in the skin of the external auditory canal. Itching, flaking and so on, so patients will often feel itchy in the ear. 2. Eczema of the outer ear: the etiology of this disease has not been clarified, and studies have shown that it is related to metamorphosis, which is commonly associated with allergens such as milk, eggs, pollen and animal dander. Secondly, it is also related to mental and psychological disorders, decreased immunity, bad ear digging habits and other factors. The main manifestations are itching inside the ear, flaking, secretion outflow, blisters and so on. Patients who often have itchy ears need to go to the hospital to improve the systematic examination and clarify the specific causes.