Ear heat may be a common manifestation of sympathetic excitation, contact dermatitis, external ear eczema and other diseases, and you can’t tell what kind of disease it is by this symptom. 1. Sympathetic nerve excitation: doing strenuous exercise or emotional excitement, resulting in sympathetic nerve excitation, local capillary expansion of the ear, blood circulation accelerated ear fever. 2. Contact dermatitis: contact with allergens, such as dust, seafood, pollen, etc., causing an allergic reaction, ear swelling, burning, itching and other symptoms. 3. Eczema of the outer ear: Ingestion of allergic substances, mental factors, neurological dysfunction, endocrine disorders, metabolic disorders, dyspepsia and other factors can induce eczema of the outer ear, manifested as itching, flaking, burning ears and other symptoms. Ear heat, it is recommended to seek timely medical treatment, identify the cause of the standardized treatment.