Skin fungus test is a clinical test to check whether the skin disease is caused by fungal infection, mainly including fungal culture, microscopic examination, Wool’s lamp examination, histopathological examination. 1. Fungal culture: Cultivate skin scrapings, nails or hair samples with fungal culture medium, and after the fungus grows, observe and identify its colony structure, color, spores and hyphae. 2. Microscopic examination: the patient’s skin lesions or nail scrapings and other specimens under the microscope to observe, see the spores, mycelium or mycelium can be diagnosed. 3. Woo’s lamp examination: in a dark room with Woo’s lamp irradiation lesions, through the fluorescence reaction to identify the presence of fungal infection, but not accurate. 4. Histopathological examination: a small amount of skin tissue is taken from the lesion area for pathological examination, which is invasive and accurate. When a patient suspects a fungal skin infection, he or she should go to the hospital in time, choose the most suitable treatment plan after clarifying the specific type of infection, and start the treatment as soon as possible to avoid the progression of the disease.