Children with red spots all over the body, can be considered for chickenpox, hives or toddler emergency rash and other diseases. 1. Chickenpox: mainly caused by the infection of varicella zoster virus, first occurred in the head and face, and then extended to the trunk, limbs and other parts of the body, initially for the red rash, can gradually become pimples or blisters and other skin lesions. 2. Urticaria: It may be related to infection, food, drug allergy and other factors, and can occur in all parts of the body, forming erythematous spots and wind clouds. 3. Childhood emergency rash: human herpes virus type 6 spreads through air droplets and other ways, the child will have sudden onset of fever, body temperature rises rapidly in a few hours, and in the sudden drop in fever to restore or normalize, red rash can appear on the neck, trunk and other parts of the body, which can subside on its own. When multiple erythematous spots appear on the body of a child, it is recommended to consult a doctor in time to clarify the cause of the disease, and follow the doctor’s instructions to treat the cause and symptoms.