Hi,
Our 7 month old son started to get a rash on his chin about 4 weeks ago, which shortly after spread upwards to above his top lip as well. The doc said it looked like a "teething rash", as it was red, blotchy with little red bumps but didn't seem to bother him at all. He does spit up a lot and has been very drooly lately, but no teeth yet. The past week or so, the patchiness is going up onto the cheeks and even his nose. It is very red/angry looking when wet, and when dry it feels almost scaly. I have tried keeping it dry, as well as applying Vaseline, Vitamin E oil and hydrocortisone cream, none of which has made much of a difference.