Eczema and tinea cruris are two different diseases that differ in their causes, clinical manifestations and infectiousness. 1. Pathogenesis: eczema is an inflammation of the superficial dermis and epidermis caused by a variety of internal and external factors such as abnormal immune function, skin barrier dysfunction and environmental factors; tinea cruris is a fungal infection of the superficial skin of the hands caused by dermatophytes. 2. Clinical manifestations: eczema in the acute stage is mainly manifested as herpes mound, oozing, chronic stage is mainly manifested as mossy changes, hand eczema is usually bilateral symmetrical distribution. Tinea versicolor is mainly manifested as flaking, blisters, rough and thickened skin on the hands, and sometimes there are roughness, cracking and peeling of the palms. Tinea versicolor usually involves one side of the hand at the beginning, and then it can spread to the opposite side. 3. Contagious: eczema is not contagious, tinea cruris is contagious, easy to infect other parts of the body (such as feet, femur) or infected to others. If patients suspect that they have eczema or ringworm, they should consult a doctor in time to find out the specific cause of the disease, and follow the doctor’s instructions for treatment, so as not to delay the condition.