Tinea corporis and psoriasis are both dermatological diseases, but they have significant differences. Firstly, the cause of tinea corporis is clear—it is caused by fungal infections. The cause of psoriasis is not particularly clear, and it is currently believed to be related to multiple factors including immunity, infection, and genetics. Furthermore, tinea typically presents with skin plaques surrounded by a ring of papules, while psoriasis frequently shows as silvery white scales, with bleeding or a film phenomenon. Lastly, their treatment methods are also different.