An eight-month-old baby with a fever and small red dots on the body is usually caused by a viral infection. Usually the fever is recurrent, and after the fever has subsided, the rash emerges, that is, the red spots are a condition that appears only after the fever has subsided, presenting the size of small grains of rice, appearing on the face or trunk, and may appear scattered, multiple, not fused into pieces, and not like hives, without itching, without uncomfortable performance. Usually the rash will subside on its own in about 1-2 days after it appears, and this is called an emergency rash. The appearance of small red dots means that the disease is in recovery phase.