The causes of ear fever and scalding often include: changes in environmental temperature, strenuous exercise, auricular septic chondritis, etc.. 1. If you have been in a low-temperature environment for a long time, you will experience clinical symptoms such as fever, frostbite, and swelling when you get back to warmth because the small blood vessels under the skin expand faster than the large blood vessels, and their blood flow increases. 2. Because after strenuous exercise or sympathetic nervous excitement, the heart rate will speed up, more blood rushes into every part of the body, and the blood vessels in the ear dilate and become hot. 3. The onset of auricular suppurative perichondritis is usually associated with surgery, trauma, or infection of neighboring tissues. Symptoms may include a painful swelling and burning sensation of the auricle, as well as redness, swelling, thickening, and firmness of the auricle on examination. Patients who can identify the direct cause of this symptom, or who experience it frequently, should actively seek medical attention to clarify the diagnosis and standardize the diagnosis and treatment.