Hi A.,
We have 2 children with allergies and asthma and many years experience dealing with this subject. Our youngest daughter was tested for allergies at age 1, but only because she had a severe respiratory reaction to a particular food which landed her in the ER. But we were told at the time that allergy testing at that young of age in general is not as accurate as waiting until a child is a bit older. But a visit to an allergist who could make a determination about what tests to try, if any, and what what remedies to use might be very helpful.
I don't know what area of town you live in, but our allergist is WONDERFUL and has offices at Allegheny General Hospital and in Bellevue at Suburban General. Her name is Dr. Deborah Gentile, and her office number is ###-###-####. She is thorough and professional, wonderful and patient with children, and very respectful of parents--listening to their concerns, taking what parents have to say seriously, and giving you as much time as you need without making you feel like you are wasting her time. Her entire staff is the same way.
Best wishes!