Of course the best thing to do is take the baby to the doctor. Some things to consider: Did you change your laundry detergent or fabric softener? Did you change the product you use to cleanse baby with? Is baby too warm (over-dressed)? Are you using lotions, etc., just for babies?
When my son was a baby, along time ago, he broke out a couple of times and I found out that (1) I changed fabric softener and when I went back to the original, baby was well. (2) I had received a sample of a particular lotion and used it on my baby and found out that it was for me, not baby, it was too strong for his skin, when I went back to original, baby was well. (2) I was overly concerned about money and tried to use a less expensive baby powder and lotion and doctor informed me to go back to original (Johnson's) and all was well. Hope this helps!!!!?!!!!!!!
at 2:43 PM on Feb. 22, 2010