Have You Experienced...
- Air hunger or "can't catch your breath" with a normal pulmonary workup
- Breath holding or sighing throughout the day
- Shortness of breath that worsens in certain rooms or buildings
- Reactive airway symptoms unresponsive to inhalers
- Symptoms tied to flushing, anxiety, or temperature change
- A normal echocardiogram, pulmonary function test, and chest imaging
- Diagnosed with "anxiety" but the breathing problem feels physical
- Worse on standing or with mild exertion (POTS-like pattern)
Quick Answer
When pulmonology and cardiology clear the standard suspects, the cause of shortness of breath is usually environmental: Babesia (the signature "air hunger"), mast cell activation in the airways, mycotoxin-driven reactive airway inflammation, or autonomic dysfunction (POTS/dysautonomia). Each is testable and treatable once correctly identified — and each requires a different specialist than the one most patients have already seen.
What's Actually Causing It
Babesia
The signature "air hunger" of tick-borne Babesia is widely missed in routine workups. Often paired with night sweats, anxiety, and unexplained fatigue. More on Lyme & co-infections →
Mast Cell Activation
MCAS frequently presents with chest tightness, throat swelling sensation, and air hunger. Often triggered by foods, temperature, or exertion. More on MCAS →
Mycotoxin Exposure
Mycotoxin-driven inflammation can reproduce reactive-airway symptoms with normal spirometry. Patients often notice symptoms flare in specific buildings. More on mold →
Autonomic Dysfunction (POTS / Dysautonomia)
The autonomic nervous system regulates breathing automatically. When it's dysregulated, breathing feels effortful even at rest. Frequently co-occurs with MCAS and chronic infection.
Hypocapnic anxiety / breathing pattern disorder
Chronic over-breathing produces low CO₂, which feels like shortness of breath. Treatable with breath retraining once underlying drivers are addressed.
Mitochondrial dysfunction
Cellular energy deficit produces exertional shortness of breath even with healthy lungs. More →
Pulmonologist said your lungs are fine?
The cause is rarely in the lungs themselves. Our assessment maps your pattern.
Testing
- Babesia panels — IGeneX, Vibrant, or LymeSpot T-cell testing
- Mast cell mediators — tryptase, histamine, prostaglandin D2
- Mycotoxin urine panel + CIRS biomarkers (TGF-β, MMP-9, VIP)
- Tilt table or active stand test — for POTS / orthostatic intolerance
- End-tidal CO₂ monitoring — for hypocapnic breathing pattern disorder
Frequently Asked Questions
In our practice, the most common causes are Babesia (a tick-borne co-infection), mast cell activation, mycotoxin exposure from water-damaged buildings, autonomic dysfunction (POTS), and breathing pattern disorders. Each is identifiable with the right testing and treatable when the cause is matched to the protocol.
Many patients with air hunger get diagnosed with anxiety, but the relationship is often reversed: the air hunger drives the anxiety, not the other way around. Babesia in particular produces a sensation of needing to take a deep breath that the body interprets as alarming. Treating the underlying infection resolves the "anxiety" along with the breathing.
Inhalers treat bronchoconstriction (narrow airways). If the cause is mast cell activation in the airway mucosa, mycotoxin inflammation, or systemic dysautonomia, the airways themselves aren't constricted in the way inhalers address. Different mechanism, different treatment.