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. Prevention: 1. 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. You can put 75% alcohol in drops to evaporate the moisture in the ear canal. 2. The main fungi that cause auricular infections are dermatophytes such as Trichophyton rubrum, Trichophyton rubrum and woolly microsporum. For auricular ringworm, use compound rezoxin application or squibconazole cream, etc. For external ear canal fungal disease, it is advisable to remove scabs and cerumen first. Then apply topical mycoplasma ointment.