The difference between ringworm and tinea cruris is mainly in the causative organisms, skin lesion characteristics, hairy parts and so on. 1. pathogenic bacteria: ringworm and jock itch are both infectious diseases, but the pathogenic microorganisms of the two are different. Ringworm is a superficial skin infection caused by microscopic rod-shaped bacteria, while ringworm is caused by fungi. 2. lesion characteristics: ringworm is mainly manifested as red to brown clear boundary, irregular edge of the patch or thin plaque-like lesions. Ringworm usually spreads to the thighs in a half-moon shape, and the rash may be ring-shaped and have a row of small blisters on the edge, the rash may have a burning or itching sensation, and the skin may be flaky or scaly. 3. Prevalent parts: Ringworm is mainly found in the armpits, buttock crease, and under the breasts of the human body. Ringworm is found on the inner thighs and groin. If you are not feeling well, you need to go to the hospital as soon as possible, and the doctor will make individualized diagnosis and treatment plan according to the specific condition, so as not to delay the condition.