Infantile emergency rash, also called infantile rose rash, is an acute pediatric infectious disease caused by a virus. Clinically, it is characterized by sudden onset of fever and fever withdrawal rash. 1, sudden onset of high fever, body temperature generally 39 – 40 ℃, fever 3 – 5 days, while other clinical symptoms are light. 2, swollen and painful lymph nodes behind the neck, occipital and ear. 3, peripheral blood leukopenia, lymphocyte classification count is high. 4.The age of onset is within 2 years. 5. Fever and rash are removed. There is no specific treatment for this disease, and antibiotic treatment is ineffective. Only symptomatic treatment is needed. If the fever is high, irritable or easily jumped, antipyretic sedative is available. If the fever continues to be high, more fluids are needed, more plain water, vegetable soup, juice, etc.