Ringworm is a fungal infection of the skin caused by a fungus that invades the skin’s keratin. Ringworm can occur on any part of the body and is mainly characterized by well-defined erythematous patches with a distinctly inflamed edge that can be accompanied by flaking and itching, etc. A definitive diagnosis can be made by scraping the skin flakes and observing them under a microscope to find fungal structures such as hyphae and spores. Syphilis is caused by syphilis spirochete infection, it is a sexually transmitted disease, can be on the skin erythema, papules, characteristic performance is in the palms of the feet and plantar areas of the copper-red rash, syphilis rash is generally not itchy, clear diagnosis can be drawn blood test, can confirm the diagnosis.