The auricular defect is caused by trauma or infection, and has its own characteristics compared with congenital microtia, such as local skin scars, poor blood supply, elasticity, and looseness. For the repair of auricular defects, we can refer to the basic principles of total auricular reconstruction and choose suitable surgical methods and tissue grafts for repair, taking into account the location, size and local tissue condition of the defect. What is the examination of bilateral auricular defects? Trauma examination: There is a little blood in the external auditory canal at the time of examination. If there is a combined external auditory canal fracture or a skull base fracture, there is more bleeding and cerebrospinal fluid ear leakage. Tympanic membrane perforations are mostly irregular fissures with blood crust on the surface. In cases of perforation caused by direct trauma, they are mostly located in the posterior half of the tympanic membrane, and the blast is mostly located in the anterior and inferior parts. The tympanic membrane is mostly normal in color, but if combined with infection, it is severely congested and has pus. Auricular hypoplasia: It is often accompanied by malformation of the external auditory canal, middle ear or inner ear. Mostly auricular deformities. Other diseases: Congenital preauricular fistula mostly has a fistula opening in front of the foot of the ear wheel, sometimes white sebaceous material can be squeezed out, redness and swelling around the fistula during inflammation, fluctuating sensation during purulence, and abscess rupture in severe cases. A limited elevation of the auricular cavity or auricular boat with positive transillumination when illuminated from the back of the auricle is a sign of a pseudocystic effusion of the auricle; a disappearing, swollen postauricular sulcus with a fluctuating sensation and pushing the auricle forward and outward should be considered a postauricular subperiosteal abscess. Diffuse auricular erythema with dark red color is a manifestation of auricular chondromyelitis, which is often the result of ear frostbite and trauma, and later auricular deformation and contracture; pressure pain in front of the ear screen, especially pain and pressure in opening the mouth, should be considered as temporomandibular arthritis or temporomandibular joint dysfunction; local lymph node pressure pain behind the ear should be examined for scalp infection such as folliculitis.