Ringworm of the skin is caused by fungal infections, commonly including Microsporum canis, Microsporum ferrugineum, Microsporum canis, and Trichophyton suis. Ringworm of the skin is a common infectious skin disease caused by fungal infection. It can usually be contracted through direct contact with the patient’s lesions, or through close contact with animals such as cats and dogs that are sick. In addition, contact with contaminated hairdressing tools, hats, pillowcases, combs, towels and other items can also trigger indirect infection. Scratching the lesions with hands can easily lead to self-infection. It is recommended that after diagnosis, patients should be actively treated under the guidance of the doctor to avoid delaying the condition, and usually pay attention to skin hygiene and cleanliness.