You’ve been living your life as usual, generally active and healthy, when suddenly you find yourself sneezing all the time, battling a constant runny nose and watery, itchy eyes. “What’s going on?” you wonder. Congratulations: you probably have developed allergies. “But how?” you argue. “I eat healthy, exercise regularly, and have a pretty good immune system.” Whether you’ve suffered from allergies your whole life, or just developed some symptoms in the last month, allergies