Tinea capitis is a common disease, accounting for 15% to 20% of ear infections. It occurs mostly in warm and humid tropical and subtropical areas. It can occur at any age, but is most common between the ages of 20 and 40. It is common unilaterally and more often on the right side and may be related to the convenience of digging the ear with the right hand. Tinea capitis starts as a red papule and blister. It then desquamates and gradually spreads and expands into a large erythematous plaque covered with scales. The edges are clear, with papules or blisters. It may extend to the external auditory canal, the whole ear, and the neck and face. The examination points of auricular ringworm: 1. Auricular ringworm starts as a red papule and blister. It starts as a red papule with blisters, and then becomes desquamated and gradually spreads and expands into a large erythematous plaque covered with scales. 2. The edges are clear and there are papules or blisters. It may extend to the external auditory canal, the whole ear, and the neck and face. 3. Patients have a history of topical corticosteroid use. 4.Self-perceived pruritus is obvious, often on one side. 5.It may be accompanied by tinea cruris, tinea corporis, tinea capitis, etc. Bacterial culture of ear, nose, and throat swabs: Bacteria in the ear, nose, and throat come from outside and are not pathogenic under normal circumstances. However, infection can occur when the body’s systemic or local resistance decreases and other external factors can lead to disease. Therefore, bacterial culture of ear, nose and throat swabs can isolate pathogenic bacteria and help in the diagnosis of otitis media, rhinitis, sinusitis, diphtheria, purulent tonsillitis, acute pharyngitis, etc. The specimen is taken by the doctor using a sterile cotton swab and the secretion from the patient’s lesion site is sent for examination. 2.CT examination of otorhinolaryngology: It is a method to examine the otorhinolaryngology through CT. The patient unloads the contraindicated items on his body as required, lies on the instrument at the request of the doctor, undergoes the examination, and looks for pathological features after deriving the image.