Itching on the outside of the ear may be caused by eczema of the external auditory canal, mycotic otitis externa, frostbite and other causes. 1. Eczema of the external auditory canal: the etiology of eczema of the external auditory canal is not clear, and it is considered to be related to factors such as allergic reactions, bad ear digging habits, and inflammation of the middle ear. The patient’s auricle, the external auditory canal, the skin around the ear will appear itching, flaking, pimples and other manifestations. If the patient has eczema of the external auditory canal, when the inflammation spreads to the outer side of the ear, it can be manifested as the symptoms of itching here. 2. Fungal disease of the external auditory canal: Fungal disease of the external auditory canal may be caused by fungal infections such as Penicillium, Candida, Aspergillus, etc., and the patient will experience symptoms such as itchy ears and stuffy feeling. When the patient’s external auditory canal fungal disease and spread to the outer side of the ear, it will be manifested as itchy ears on the outside. 3. Frostbite: prolonged exposure of the ear to wet, cold environment will lead to spasmodic contraction of skin blood vessels, tissue hypoxia and bacterial damage. At this time, the patient will be localized skin limited edema purplish-red patches, nodules, itching and other manifestations. If the patient’s ears on the outside of the frostbite, there will be itchy manifestations. Patients with contact dermatitis on the outside of the ear, insect bite dermatitis and other diseases can also lead to this symptom, it is recommended to actively seek medical attention and systematic examination to clarify the diagnosis and etiology.