Many of these cases are due to allergies to certain substances in the ear, which cause ear fever, swelling and itching. In addition, ear fever can also be related to emotions. The blood vessels in the skin of the ear are also innervated by nerves and nerve impulses are affected by emotions, so ear fever can occur when emotions change, and if there is no persistent and severe pain, no treatment is needed. In addition, it is important to pay attention to whether there is ear pain when the ear is feverish and whether there is a fluctuating sensation to touch. If there is a generalized fever, it is important to pay attention to whether there is acute purulent auricular chondromyelitis. This disease should not be missed and should be treated as early as possible to strengthen anti-infection and, if necessary, surgical treatment, because this disease, if misdiagnosed or missed, may lead to a deformity of the ear in later stages.