Hives Baby Teething My 20 Month Old Broke Out In Hives 2x Today. She Is Teething And Had Tylenol Before Each Outbreak?

My 20 month old broke out in hives 2x today. She is teething and had tylenol before each outbreak? - hives baby teething

She took Tylenol, since I was a baby, and never had any reactions. You can neither eat, he has eaten, as most nurses are due to teething problems. Can you develop an allergy to Tylenol 20 months? I use dye-free, so it is not the color. Thank you!