M.Q.
Hi C.. Sounds to me like she definetly has an allergy to latex. If you want to know for sure then you could take her to an allergist and they would be able to verify it for sure. My daughter is 3 this April and still uses her pacifier. Her dentist told me it is perfectly fine for her to have it up to 5 because if you take the paci away to soon then they resort to their fingers. The thumb or finger sucking is what ruins their teeth. Go to an allergist they do a simple quick procedure on her back and then you will know for sure. I did it with my daughter and I am glad I did.Good Luck!