Reddening of the ears may be caused by hot and cold stimulation, mental factors, eczema of the outer ear, purulent chondritis of the auricle and other reasons. 1. Cold and hot stimulation: often in the low-temperature environment by the cold stimulation or high-temperature environment in the excessive stuffy heat, will cause localized redness of the ear, out of the environment can gradually improve. 2. Sympathetic nervous excitement: in excessive tension, excitement, after doing strenuous exercise, resulting in rapid local blood circulation in the ear, capillary expansion caused by redness of the ear, soothe the emotions, proper rest can gradually improve the symptoms. 3. Eczema of the outer ear: eczema that occurs in the auricle, acute eczema period, there is redness and swelling of the auricle, scattered erythema, corn-like papules. 4. Auricular suppurative chondritis: mostly due to trauma and infection, causing acute suppurative inflammation of the auricular cartilage membrane. Early for local burning sensation, redness, swelling and pain, followed by the whole auricle diffuse swelling, pain intensification. Need to use a sufficient amount of, broad-spectrum, sensitive antibiotic anti-infection treatment, such as ceftriaxone and other drugs. Drugs must be applied under the guidance of a doctor. Patients with reddened ears should go to the hospital, clarify the cause of the disease, and then standardize the treatment according to the doctor’s diagnosis.