The left ear has been hot, clinically consider the following possibilities: the first is auricular chondritis, commonly caused by bacterial infection of the auricular cartilage and cartilage membrane of the infection, the serious manifestation of the auricular surface of the redness, swelling, burning or even the formation of localized abscess, clinically need to choose a sufficient amount of sensitive antibiotics for anti-inflammatory treatment, once the formation of localized abscesses need to be incised and drained treatment. The second is that some patients have auricular dengue, mainly bacterial infection, invasion and involvement, clinically very common diagnosis is not difficult, clinically the main choice of antibiotics, common penicillin or cephalosporin for anti-inflammatory symptomatic treatment. The third disease some patients have acute otitis externa, acute otitis media, inflammation and infection is more serious when the auricle can appear fever and other manifestations, the patient is generally accompanied by elevated body temperature and other related manifestations.