Curing mycobacterial otitis externa usually requires 2 to 4 weeks of medication. Mycotic otitis externa is prone to recurring episodes and is mainly treated with medication, most of which can effectively relieve or eliminate symptoms in 2~4 weeks. Generally, it is necessary to use saline or 3% hydrogen peroxide to thoroughly clean the secretions in the ear canal, and then apply antifungal ointment (e.g. tretinoin econazole cream, miconazole nitrate cream, etc.) for treatment. Mycotic otitis externa is caused by a fungal infection of the external ear canal. Water in the ear canal, frequent ear digging, swimming, etc. creates an environment conducive to fungal growth, while chronic systemic diseases, decreased body resistance or long-term use of large quantities of antibiotics also provide conditions for fungal growth. If you suspect mycotic otitis externa, you need to go to the hospital in time, and improve the relevant diagnosis and treatment and medication under the guidance of the doctor.