my little pak hei had the same experience 2 weeks ago and he was 5 months, he also got fever around 101-102 for 3 days and then the red spot come out for 2 days then all the red spot gone. my mother bought the green vegetable (pasley or parsley) sorry i don't know the exact name of that vege but this vege is the one can use for hot pot as a soup base. my mother boil the vege and bath for my son it can make the red spot come out more faster and he won't feel so itchy, he use the vege for 3 days and actually i think it really works because my son didn't feel upset or look sick he was still very okay, so maybe you can try. don't be so worry la, my elder son also got that red spot when he was 6 months, the doctor told me that most of the children will have this experience when they are 6 to 18 months.