Usually, the following situations may occur: first, after strenuous exercise; second, when there is a sudden change in the external temperature; third, when excessively nervous and excited; fourth, dietary factors. Strenuous exercise, most of the body’s blood will be distributed preferentially in the limbs, after the exercise of the muscles need less blood, but the heart is still beating rapidly, then there will be more blood to the head, because the ear’s skin is thinner, and contains a wealth of capillaries, at this time there will be a symptom of fever in the ear. In the cold winter, when we enter the warmth of the room from the outdoors, the original contraction of the ear blood vessels will be the first to rapidly expand, resulting in increased blood flow, will also feel the ear fever, if at the same time, itching, suggesting that frostbite may occur. When we are overly nervous and emotional, the cerebral cortex will command the nervous system to release a series of neurotransmitters, causing blood vessel expansion, increased blood flow, and heat in the ears. Eating too much spicy food, or quoting large amounts of alcohol or coffee and other beverages can also lead to the dilation of blood vessels in the body, causing fever in the ears. If the ear fever is caused by the above conditions, usually no special treatment is needed, as long as the triggers are eliminated, the symptoms of ear fever will disappear on their own.