1. Causes of red spots on baby’s face Red spots on baby’s face may be caused by many reasons. Generally speaking, these red spots can be divided into two categories: one is caused by disease, and the other is caused by external stimulation. 1. Red spots on the baby\’s face caused by disease may be a manifestation of certain diseases, such as chickenpox, measles, rubella, etc. These diseases will have different processes in patients.