What Causes Allergies?
Almost anything can trigger allergies. Common culprits include:
Minor injuries, extreme temperatures, exercise, or even emotions can trigger your symptoms, even though you’re not allergic to these things.
Your reactions are unique to you. For example, your body may have learned to be allergic to poison ivy from repeated exposure.
Allergies run in some families. But you can have them even if your parents don’t. Many people who get symptoms from one thing react to other things, too.
You’re more likely to have allergies if you’ve had: