Itchy and painful ears may be due to the appearance of external ear eczema, contact dermatitis, mosquito bites and so on. 1. Eczema of the outer ear: a common skin disease, the cause of which may be related to perverse reactions, psychoneurological factors, endocrine disorders and so on. Acute eczema patients will appear localized giant itch, often accompanied by burning sensation. If secondary infection occurs, pain is felt and temperature rises. The indication can be seen scattered erythema, small corn-like papules and small translucent blisters, and red vesicles appear after breaking. 2. Contact dermatitis: is due to contact with certain exogenous substances, in the skin mucous membrane contact parts of the acute or chronic inflammatory reaction. Happens in the ear, often conscious itching or burning pain, scratching can bring the pathogenic substances to the distant parts and produce similar lesions. 3. Mosquito bites: mosquito saliva contains a large number of proteins and other allergens, bites, into the allergen, the local allergic reaction and inflammatory reaction will occur, resulting in itching and pain. If the ear is painful and itchy, it is recommended that the patient go to the hospital to identify the cause of the standardized diagnosis and treatment.