Diaper rash in babies is mainly due to contact dermatitis formed after repeated contact between the skin and urine, which can show clinical symptoms such as erythema, papules, blisters, vesicles, oozing, etc. It is mainly confined to the area in contact with the diaper, and the child will react by crying and scratching. In terms of treatment, it is recommended that the child should not wear a diaper and replace it with a breathable cotton cloth, and then apply moisturizers, such as hyaluronic acid gel or humanoid collagen milk and other moisturizers, to the surface of the skin where clinical symptoms have appeared, and then apply glycerine lotion or zinc oxide cream at 10-minute intervals, and it is expected that the symptoms of the diaper rash will gradually subside in 10 days or so, but there will be a residual transient pigmentation, which will be flat with the skin It is not painful or itchy and will gradually subside over time, returning to normal in about 1-2 months.