Hi, my 5 year old daughter suddenly developed a purple mustache-like rash this afternoon after dinner. I thought it was jelly from her sandwich at lunchtime and I had missed wiping it, but it was a definite rash. After examining it, I took her temp and she had a slight fever of 100 degrees in one ear and 99.6 in the other. I gave her Mucinex this morning for a cough that she seemingly caught from big brother...wondering if it is an allergic reaction to the Mucinex? There is also hand, foot and mouth disease going around among friends kids and her 2-yr old baby sister had it about a month ago. I checked her thoroughly for spots and the only one was a small sore in her mouth that she has had since yesterday. Any ideas? Hand, foot and mouth usually comes with a higher fever, right?