Walnut Tree Allergy Blood Test in Arizona

What this test measures

Tree pollen is a common cause of seasonal allergic rhinitis, often called hay fever. Walnut trees release fine pollen during their flowering period, and sensitive people may notice symptoms when the pollen counts are high. Because different trees pollinate at different times, the timing of symptoms can help point to the likely trigger.

The test detects tree pollen-specific IgE in serum with a laboratory immunoassay. A single blood draw is sufficient, and the report lists a quantitative level and a reactivity class for walnut tree pollen. Results are often reviewed together with other tree, grass, and weed pollen tests to build a seasonal profile.

A positive result indicates sensitization rather than a guaranteed cause of symptoms. Exposure levels, weather, and individual sensitivity all shape whether pollen produces symptoms. Clinicians use the result with a symptom diary and other findings when discussing ways to reduce exposure and manage symptoms.