The fungi that cause auricular infections are mainly dermatophytes and woolly microsporum, which originate from direct spread of ringworm on the head and face or direct or indirect contact transmission of ringworm on the hands and feet, ringworm on the body and nail, etc. This type of infection is called auricular ringworm, and the majority of pathogens that cause auricular ringworm are Aspergillus fumigatus and Aspergillus niger. Patients who have aural ringworm should be examined and diagnosed promptly. The diagnosis of auricular ringworm is based on the following: 1. Itching of the affected ear, especially at night, ear congestion, hearing loss, dizziness and tinnitus, and even ear pain. 2. The outer ear canal is flushed and edematous, covered with scabs and flaking, with moist hairy surfaces, with hairy mold growth, with secretions under the scabs, with skin maceration and erosion. 3. The extent of the lesion may spread and expand, spreading to the skin outside the ear or neck, and the cartilage of the ear wheel may also be involved. The tympanic membrane may become engorged with redness and swelling and may become perforated. 4. A small amount of skin flakes, cerumen or scabs from the ear canal can be examined microscopically and mycobacteria can be detected. We should pay attention to keep the ear canal dry and clean, prevent sewage from entering the ear, develop good hygiene habits, and avoid digging the ear with your hands. Bath water should be removed immediately after entering the ear, and 75% alcohol can be put in drops to evaporate the moisture in the ear canal.