Pollen & the POTS-MCAS Loop
Does hayfever or pollen trigger POTS symptoms?
Pollen can trigger Mast Cell Activation (MCAS), which frequently co-occurs with POTS.
When the body encounters pollen, it releases histamine. Histamine is a potent vasodilator (it widens blood vessels), which directly worsens POTS-related blood pooling.
This often results in air hunger (difficulty taking a full breath), racing heart, and a general wired but tired feeling during the Australian spring.
The Northground Insight
In many parts of Australia—especially Canberra and Adelaide in spring—high pollen levels can cause whole‑body inflammation, not just itchy eyes.
If you find your POTS symptoms spiking alongside your hayfever, you’re likely dealing with the Histamine-POTS loop. Your nervous system is reacting to the pollen as a literal invader, keeping you in a state of high-alert hyperarousal.
Somatic Tip for Air Hunger
When you feel that "I can't get a full breath" sensation (common in spring), try Low and Slow exhales.
Breathe in for 4, and breathe out through pursed lips (like you're blowing through a straw) for 8.
The long exhale stimulates the parasympathetic nervous system and helps override the suffocation alarm your histamine response is tripping.
Check today's Pollen Count and POTS trigger risk with our Australian based POTS Weather Checker.
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