Fever in the left ear clinically refers to the following: i. Some patients have auricular infections, such as auricular suppurative chondritis, which present with auricular surface redness, burning sensation, burning, and fever, which are symptoms that occur when inflammation involves the cartilage and cartilage membrane under the skin of the auricle. Second, patients with acute otitis externa, acute otitis media, etc. induce auricular fever, which is also clinically manifested. Some patients may be nervous about things, encounter people they are afraid of or be timid, and so on, and may also have the performance of localized auricular fever and burning. Fourth, the patient suddenly enters the warm environment inside the house from the cold environment outside, resulting in the patient’s auricular local microcirculation blood flow speed up and the performance of auricular fever.