If your child has allergies, you know the drill to try to give them allergy relief: tissues in every room, constant antihistamine refills, missed school days, and nights spent awake listening for that next cough or sneeze. For many families, managing allergies isn’t just inconvenient. It’s a year-round challenge that chips away at energy, time, and, yes, your wallet.   Maybe you’ve heard of allergy immunotherapy, a treatment that goes beyond daily meds and tackles the root of the problem. But if you’ve also heard it’s expensive, you’re not alone. Is it worth the cost? Let’s walk through what you really need to know as a parent trying to make…