Fungi are eukaryotic organisms with a nucleus and cell wall that are closely related to human life. Some of these fungi cause diseases in humans and are classified as superficial fungi and deep fungi. The former can cause chronic and persistent skin diseases such as ringworm of the head, ringworm of the face, ringworm of the hands and feet, ringworm of the femur, ringworm of the finger (toe) nails, etc. The deep fungi can invade the internal organs of the whole body and can cause death in serious cases. In addition, fungi can also cause certain allergic diseases, toxic diseases. Laboratory examination of fungi, there are several methods: 1, fungal microscopy. In the skin scrapings, hair or nail specimens found in the skin ringworm, Candida and other fungal components can provide a reliable diagnosis of the corresponding fungal disease, its advantage is simple, fast, but because of the low rate of positivity, negative results can not exclude the diagnosis. 2, fungal culture: can be strain identification, but it often takes 3 to 4 weeks to report the results. 3.Filtered ultraviolet light examination: In clinical practice, it provides a reference basis for the diagnosis of superficial fungal diseases, especially ringworm of the head. For the treatment of fungal skin disease, we can choose topical and oral medications, but we should pay attention to the course and regular treatment, and the key is patience and persistence, and we should pay attention to personal hygiene in general. Our department routinely conducts fungal microscopy, culture and identification to confirm the diagnosis of superficial and deep fungi, and uses oral medications and special topical medications made by the hospital, such as compound copper sulfate solution, compound benzoate solution (ointment) and compound lactic acid coating, to completely cure various fungal diseases.