Hi Cindy, welcome to Healingwell
Yes, allergies....airborne or food, can develop as adults. I myself have never been allergic to strawberries until about
2 years ago. I broke out in red blotches all over after having strawberries. Shell fish are notorious for causing allergies in children and adult alike but it shouldn't make you afraid to eat. We need food to survive but just make sure until your results are in to avoid seafood and shell fish and Iodine.