There are two possibilities for ringworm: tinea corporis (fungal infection) and dry eczema. At this stage, ringworm is very rare in children because of better public hygiene awareness, and dry eczema is more likely to be considered. The specific differentiation treatment is as follows: Tinea corporis and dry eczema can both have erythematous patches surrounded by fine scales and accompanied by itching. The difference is twofold: 1. Tinea corporis is often round or round-like with clear borders and a light central color that expands in a circle, whereas dry eczema does not have this feature. 2. Dry eczema is often dry and occurs in the fall and winter, but ringworm does not. If you can’t identify ringworm with the naked eye, you can go to a dermatologist for a fungal microscopy, and a positive result means that there is a fungus that is ringworm. For ringworm, external antifungal creams, such as ketoconazole cream, should be used once a day, and the rash should subside within 2 weeks. Because fungal infections tend to recur, it is recommended to use it for a full 4 weeks to prevent recurrence. Dry eczema treatment is mainly based on emolliency and less bathing. It is recommended to use water at about 36°C, just rinse 2-3 times a week, and emollient with plenty of Vaseline, silicone oil, etc. every day. For red rash areas, topical hydrocortisone butyrate cream or tretinoin econazole cream is recommended once a day and stopped when it gets better. The two diseases have similar manifestations, but the treatment differs greatly, and a clear diagnosis is recommended before treatment.