The reason why fungal diseases are difficult to treat is related to the characteristics of fungal diseases, failure to take medicines according to the course of treatment and other factors. 1. Characteristics of fungal diseases: Fungal diseases are characterized by easy recurrence, infectiousness, high morbidity or re-infection, which leads to difficult to treat fungal diseases. 2. Failure to take medication according to the course of treatment: patients with fungal diseases are usually treated actively, will be significantly relieved in a short period of time, some patients may stop using the drug after the symptoms are relieved, resulting in insufficient medication course, so that the fungus can not be completely killed, resulting in recurrent episodes of the disease phenomenon. If the patient is diagnosed with fungal disease, it is recommended to go to the hospital in time for treatment, and at the same time should also check the family and pets, so as to avoid cross-infection, during the treatment period to comply with the doctor’s instructions on time, according to the amount of medication, according to the course of treatment, and must not be privately omitted, discontinue the use of medication, in order to avoid the impact of the recovery of the disease.