Rash after viral cold in babies, consider that it is caused by toddler’s emergency rash, measles and other factors. 1. toddler emergency rash: toddler emergency rash is mainly due to the baby’s poor resistance, resulting in human herpes virus type 6 infection caused. After infection, the baby will have a high fever, body temperature is often higher than 39 ℃, when the fever will appear pink small dense macular rash. 2. Measles: usually due to measles virus infection of the respiratory mucosa, triggered by an acute respiratory disease. The baby will mainly appear high fever, cough, runny nose and other cold symptoms, in the third day of fever began to rash, will first appear in the buccal mucosa on the white dots the size of sand grains, and gradually to the lower body to the whole body, the appearance of red maculopapular rash. Rash after the baby viral cold, there may be other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, to give targeted treatment or treatment.