Dizzy – The Microclot Signal No One Warned You About

What if your dizziness isn’t in your head—but in your veins?

We found that many individuals with long COVID report dizziness and orthostatic intolerance, often linked to vascular dysregulation.

— Dr. David Systrom, Brigham and Women’s Hospital, researcher on long COVID-related blood flow reaching tissues problem. A small vessel circulation problem.

And if you’ve had COVID, a few vaccines, or have a history of varicose veins, chronic venous insufficiency (CVI), poor circulation, or long-haul symptoms—you might already be in the danger zone.

Microclots – Like Rabbits in the Garage

If you’ve read our prior posts on microclots (see them here), you already know the deal:

• Microclots act like tiny traffic jams in your capillaries.
• These clots trigger inflammation and endothelial damage.

Once that damage starts? It spreads. Not linearly—geometrically. Every clot you don’t clear? It paves the way for more dysfunction.

Dizzy isn’t random. It’s what happens when blood—and oxygen—don’t get where they need to go fast enough.

Especially when you stand up. Especially when your nitric oxide system is wrecked. Especially when your hormones are tanking. (Oh, yes, we’re going there.)

The Real Reasons You’re Dizzy

Most likely culprits for your dizziness, that have nothing to do with inner ear crystals:

1. Orthostatic intolerance – When you stand up, and your blood doesn’t
   • Blood pools in the legs (hello, varicose veins – sometimes not even visible)
   • Brain doesn’t get enough blood flow
   • Heart rate spikes to compensate
   • You feel lightheaded, woozy, off-balance
2. Nitric Oxide Dysfunction
   • Too little? Brain fog and fainting
   • Too much (rebound)? Headache, flushing, dizziness
   • Long COVID and spike protein exposure dysregulate this pathway
3. Glymphatic Backflow – Your brain’s nightly cleanup system that clears cellular waste through fluid channels—if it’s clogged, waste builds-up
   • If your lymph and venous systems aren’t draining, toxins build up
   • Especially at night — you wake up dizzy
   • Bonus: Blurry vision, head pressure (sometimes behind the eeys or in the ears), tinnitus
4. Hormonal Blood Flow Confusion
   • Low estrogen, progesterone, thyroid hormone, or testosterone?
   • Less vascular tone, more pooling, less stability
   • Dizziness becomes your new co-pilot
5. Microclots Everywhere
   • No mainstream treatment protocol – because they’re not formally acknowledged
   • In US, politics is interfering with science
   • Nattokinase and proteolytics = half measures
   • SDX (Sulodexide) may help, but not in the US – FDA hasn’t approved it

If You’ve Had COVID or Multiple Vaccines…

You are not imagining things.

The dizziness is real. The damage is real. And no one is screening for it.

The Dizzy Signal Series: What’s Next

This post is just the beginning. Coming soon:

• Dizzy & Compression: Why it helps (until it doesn’t)
• Dizzy & Salt: Friends or enemies?
• Dizzy & Hormones: The Great Crash
• Dizzy & Detox: When your liver can’t keep up

And, most importantly: How to decode what your dizzy signals are trying to tell you. Because dizzy isn’t just a symptom—it’s a signal. And we don’t ignore signals.

Your body is trying to tell you something: We’re here to help you listen.

References

Systrom, D. et al. (2023). Insights into Long COVID-related Vascular Dysregulation. Frontiers in Cardiovascular Medicine.
Pretorius, E. et al. (2021). Persistent clotting protein pathology in Long COVID/Post-Acute Sequelae of COVID-19 (PASC) is accompanied by increased levels of antiplasmin. Cardiovascular Diabetology.
Johansson, M. et al. (2023). Long COVID: autonomic dysfunction and the role of orthostatic intolerance. Journal of Internal Medicine.
Panza, J.A. et al. (1993). Abnormalities in vascular function and nitric oxide activity in patients with orthostatic hypotension. Circulation.