If the symptoms can’t be managed with medicines, your child might have to undergo immunotherapy, which can help desensitize him or her to allergens. Immunotherapy can be obtained from an allergist or immunologist. Your Westminster pediatrician can recommend a good one for you to visit once he or she determines that immunotherapy is necessary for your child.
http://www.indiancrestpeds.com/industry-news/westminster-co-pediatrics-new-treatment-hay-fever-horizon/