Other practitioners are welcome to copy and use this material, but by permission only please. Folks intending to self-treat based upon this information would do well to first read the disclaimer , and then pay close attention to this page. Nasal allergy can lead to many other problems which are not so obvious. Skin tests are more accurate but are, of course, more irritating.
Testing is also very helpful for devising avoidance strategies.
There are two problems with avoidance. First, avoidance is only effective if you have full knowledge of your allergies. Testing is helpful in this regard, but allergy tests aren't perfect. Second, avoidance is only effective if you are willing to practice avoidance. Some folks are willing and able to do this, and some folks are not.