immune disorders
Seasonal Allergies
Diagnosis of Seasonal Allergies
A doctor's evaluation Sometimes a skin test or an allergen-specific immunoglobulin test The diagnosis of seasonal allergies is based on symptoms plus the circumstances in which they occur—that is, whether they occur only during certain seasons. This information can also help doctors identify the allergen. Typically, no testing is necessary, but occasionally, the nasal discharge is examined to see whether it contains eosinophils (a type of white blood cell produced in large numbers during an allergic reaction). 