Body tinea, also known as tinea or ringworm, is caused by Trichophyton, Microsporum or Epidermophyton. The main sources of infection are tinea manuum, tinea pedis, onychomycosis and contaminated clothes. Humidity, obesity, sweating, friction, inattention to cleanliness, diabetes, and low immunity are all prone to illness. Tinea corporis is tinea that occurs on the face, neck, trunk and limbs. Ancient medical books called it tinea. This disease is also called tinea corporis in western medicine. At first, it is a small papule, which gradually expands outward and the center tends to heal itself. Round or multi-ring, surrounded by papules, blisters, scabs or scales, higher than the skin. Clear boundaries, mostly in the face, neck, trunk, limbs, conscious itching. Tinea corporis is easy to be cured, and compound benzoic acid solution or ointment, 1% clotrimazole ointment or 10% glacial acetic acid solution can be used externally. In order to avoid recurrence, treatment must be thorough. In addition, there is a kind of tinea called tinea cruris, which occurs in thighs, perineum, anus and buttocks. Its clinical manifestations are basically the same as tinea corporis, and the treatment methods are the same. Tinea versicolor, commonly known as sweat spot, is caused by tinea versicolor. Infected by contact with carriers or their clothes, bedding and mats. In summer, the skin is sweaty and humid, and it is easy to get sick. Tinea versicolor is more common in adults, and usually occurs in the chest, back, neck and upper arms. At first, it was a round spot the size of soybean, which was grayish white, brown or yellowish with tiny chaff scales attached to it. Later, there were more and more lesions, and sometimes they could be merged into pieces. After scaling, temporary hypopigmentation spots will be left. The course of the disease is slow and will not heal for many years. Summer is heavy and winter is light, with no symptoms or slight itching. Tinea versicolor grows on the skin surface, and topical fungicides are easy to work. Commonly used are 20 ~ 40% sodium thiosulfate solution, compound rizosin liniment and 5% sulfur cream. In order to prevent recurrence, it still needs to be applied for about 2 weeks after all skin lesions disappear. Tinea corporis is a superficial fungal infection that occurs on smooth skin. Tinea cruris refers to skin fungal infection around groin, perineum and anus. 【 Pathogen 】 This disease is mainly caused by Trichophyton rubrum in China, followed by Trichophyton rubrum, Microsporum and Trichophyton epidermidis. 【 Clinical manifestations 】 The diseased skin is slightly red and swollen, with one or more papules or blisters the size of a red needle, which then fuse into a well-defined plaque. The surface is thin with scales, the rash gradually expands outward, the center retreats, and most papules or blisters on the edge are arranged in a narrow circle. Sometimes it is damaged in concentric circles due to reinfection of the center. Skin lesions vary in size, generally between 0.5 and 5 cm in diameter. It can be a single piece or several pieces, which are integrated with each other. Injuries often occur in damp, sweaty and rubbing parts, such as waistline and armpit, but also in trunk, limbs and face, and the performance is often atypical. As time goes on, the skin lesions will turn dark red with thin scales and pigmentation in some areas. Patients often itch, and local skin undergoes lichen-like changes due to scratching. Due to different pathogenic bacteria, their clinical manifestations are also different. Trichophyton rubrum causes a slow course of disease, and skin lesions are more common in face, trunk and limbs, similar to disseminated neurodermatitis. Trichophyton gypsum often occurs in wet parts such as thighs, armpits and under breasts, and there is still pigmentation after healing. Microsporum hirsutum is harmful and abundant, with obvious inflammation, blisters, pustules, scales and scabs around it.