Infantile roseola, also known as toddler’s rash, is a viral infection that affects children aged 0.5 to 2 years. Children mainly present with a high fever, usually reaching a temperature of 39°C or higher, accompanied by uncommon respiratory symptoms. The fever usually lasts 3-5 days, and after the fever subsides, papules and rashes appear on the skin of the neck, face and trunk, usually without itching, and the rash subsides after 1-2 days. Because rose rash or toddler’s emergency rash is caused by a viral infection, children are usually in a better mental condition and generally treated symptomatically without the need for antiviral medication to avoid adverse drug reactions, such as drug rash, after taking medication to aggravate the condition. The symptoms can subside in a few days with better care, sleep and diet.