Abstract: Kerion is a fungal skin disease caused by the infection of Microspore genus,which can lead to a large area of cicatricial alopecia and affect the physical and mental health of patients. Early correct diagnosis is extremely important. Fungal pathogen detection is the main basis for the diagnosis of tinea capitis at present, but there is a certain false negative rate in fungal direct microscopic examination, and it takes a long time for fungal culture. One case of kerion in a child was diagnosed by dermatoscopy and fungal fluorescence staining. Fluconazole combined with glucocorticoid treatment was satisfactory.

Key words: kerion, fluorescence staining, dermatoscope