Welcome to HealingWell! Yes, it could be something in the bubble gum she is reacting to: food coloring, flavoring, a sweetener, preservative, or some other ingredient. It would be good to discuss this with an Allergy specialist, since they are trained how to figure out what she may be reacting to. And it would be good not to give her more gum until you meet with the Allergy specialist, too. Keep us posted on what you find out.
Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication Allergies & Intolerances, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD (Lupus?), Osteoporosis, Anemia, T- & B-Cell Lymphopenia, malabsorption/malnutrition, Lyme Disease (Igenex Lab IgM WesternBlot positive/CDC negative), etc.
Meds: Pulmicort, Injectable Vitamin B12, Herbs, Nutritional Supplements, Homeopathy.