My Daughter Has Frequent Sinus Infections. She Has Allergies And

My daughter has frequent sinus infections. She has allergies and tried receiving allergy injections, but she was sick so often that she could not develop a tolerance for increasing the allergy titer and injections had not be stopped. She was evaluated by an ENT doctor who performed surgery, cleaning out the sinuses, but did not deem that enlarging the openings was warranted. She has sinus infections every month or two and responds quickly if placed on prednisone and an antibiotic promptly. Should she see a different type of physician or is there anything else that can be done?