Respira
Birch pollen allergy
Birch is a potent early-spring tree allergen and one of the best-studied, because its major protein is the reference point for a whole family of cross-reactions. In the United States it matters most in the northern tier and at altitude.
Season
March to May, later the further north you go.
Pollen seasons shift with latitude and elevation — the same species can start six weeks apart in Texas and Minnesota — so treat these months as the shape of the year rather than a date to plan around. Respira shows the level measured for your own location each day.
Symptoms commonly associated with it
Associated with rhinitis and conjunctivitis in early spring. Birch is the classic trigger for oral allergy syndrome — an itching or tingling in the mouth after eating certain raw fruits, particularly apples, cherries and stone fruit.
Where it occurs
The Northeast, the Upper Midwest, the northern Rockies and the Pacific Northwest.
Track it day by day
Respira reports birch pollen for your location every day, alongside the other ten species measured across the United States, air quality on the EPA scale, and a symptom diary you can export for your allergist.
Other allergens in the United States
Respira is an informational tool. It does not replace diagnosis or advice from a medical professional.