You stand up from the couch and the room tilts. Your heart takes off like you just sprinted up a flight of stairs, except you only stood up. Your vision narrows. You grab the wall and wait for it to pass, and you think the same thing you think every single time.
This should not be hard.
If you live with POTS on top of chronic fatigue, you know this moment intimately. The racing heart. The lightheadedness. The near-faint that makes you plan your whole day around how few times you have to get vertical. And you have probably been handed two separate stories for it. One doctor treats the fatigue. A cardiologist treats the POTS. Two clinics, two diagnoses, two piles of advice that never quite add up.
I want to name the elephant in the room. POTS that travels with chronic fatigue is almost never its own island. It is one more symptom of the same underlying collapse that flattened your energy in the first place.
POTS is part of the dysautonomia, not a separate disease
Here is the part the two-clinic model misses.
When the energy system runs dry and the autonomic nervous system gets dysregulated, the controls that manage your blood pressure and heart rate on standing go haywire. That is not a coincidence sitting next to your fatigue. It is the fatigue, expressed through your circulation.
Step back and look at how this whole thing starts. Long Covid and ME/CFS, at the base level, are metabolic damage from stress. Years of caloric restriction, a high-stress life, not enough sleep, a viral hit the depleted body could not handle. Stack those and the system breaks. The HPA and HPT axes that govern your stress response and your thyroid stop holding the line, and the body drops to a lower energy set point. It starts shutting down and conserving everything it can.
Your autonomic nervous system is the management layer running all the things you never think about. Heartbeat. Blood vessel tone. The reflex that tightens your vessels and nudges your heart the instant you stand so blood does not pool in your legs. That reflex is metabolically expensive. It runs on energy and on a healthy stress-response axis. When the whole system has dropped to a lower floor and the autonomic controls are dysregulated, that reflex gets sloppy.
So you stand. Blood drops to your legs. Your brain notices it is short on flow a beat too late. And your heart panics and races to make up the difference. That racing heart is not a heart problem. It is your circulation trying to rescue a brain that is not getting enough blood, on a body running at a fraction of capacity.
The published work on Long Covid backs the link between the temperature and energy story and the autonomic one. Fernandez-de-Las-Penas and colleagues (2023) found an imbalance of peripheral temperature, sympathovagal function, and inflammatory cytokines in Long Covid. Translated out of the jargon: the same metabolic dysregulation that drops your temperature and drains your energy shows up in the autonomic nervous system at the same time. Same collapse. Different symptom on the surface.
That reframe matters, because it changes what you are actually trying to fix.
Why fixing the terrain beats only managing the symptom
The standard POTS playbook is built around blood volume. Load salt and water, wear compression, take a beta-blocker to slow the racing heart. None of that is wrong. It can genuinely make standing up more survivable, and if it helps you, keep doing what your clinician has set up.
But notice what that playbook does and does not do.
Salt water props up the volume. Compression squeezes the legs. A beta-blocker blunts the heart rate. Every one of those is aimed at the symptom on the surface. None of them touches why your autonomic controls went sloppy in the first place. It is like airing up a flat tyre over and over without ever asking why it keeps going flat.
This is the difference between managing a condition and addressing the terrain underneath it. The terrain here is your cellular energy and your autonomic floor. Restore the energy your cells can actually receive and use, calm the dysautonomia by rebuilding that metabolic floor, and the controls that fail on standing get a real shot at recalibrating. That is the durable path. Symptom management keeps you upright today. Fixing the terrain is what changes the trajectory.
And the terrain is where the thyroid piece comes in, because so much of this traces back to energy your cells cannot get. When metabolic stress gets severe enough, the same cellular resistance that blocks insulin also blocks thyroid hormone from getting into your tissues. Your blood labs can read normal while your cells are starving. That tissue-level T3 starvation is why your temperature sits below 98.6, why your energy is gone, and why the energy-hungry autonomic reflexes cannot keep up when you stand. I unpack that gap between normal labs and a starving cell in the thyroid problem that starves your cells.
Clear the persistent viral and inflammatory debris sitting in blood vessel walls and nerve tissue, restore the energy to the baroreceptors and autonomic neurons, and blood volume, sensor function, and the deconditioning all sit downstream of that. They tend to improve as the root cause clears, rather than the other way around.
The honest caution: dry fasting with POTS needs care
Now I have to be straight with you, because this is exactly the kind of case where I will not hand you a one-size protocol.
Dry fasting is central to how the Scorch Protocol resets the terrain. And dry fasting with POTS specifically needs caution and supervision. POTS lives and dies on hydration and electrolytes, and a dry fast removes fluid. There is real mechanism on the reassuring side. During a dry fast the body shifts hard into conservation: aldosterone climbs, the kidneys hold onto sodium and potassium and magnesium instead of dumping them, and vasopressin rises so you hold onto water. In other words your body does its own salt-loading, more precisely than any supplement stack. That is why the mechanism does not run the way most cardiologists fear.
But mechanism on paper is not a green light to fast recklessly. The first day or two can be legitimately rough for POTS. The early stress-hormone surge can mean more palpitations and more dizziness before it settles. That is expected. What is not a push-through moment, and what you stop for, is a resting heart rate over 120, no urination for more than 12 hours, fainting, leg swelling, or confusion. Those are hard stops.
A sensible way in for POTS is not a multi-day fast at all. It is a short 18 to 20 hour intermittent dry fast first, with your electrolytes loaded in the eating window before you start, just to learn how your body responds. And if your POTS and your fatigue are severe, the order often flips: T3 therapy first to build an energy floor, before any extended fasting is even on the table. Severe cases get individualized and supervised. That is not a hedge. It is the whole point. Your labs, your meds, your history, and a clinician in the loop are what make this safe instead of reckless.
Where this leaves you
Standing up should not feel like a battle. And for a long time you have probably been told it is just one more thing to manage, separately, forever.
I want to leave you with something more honest and, I think, more hopeful. The racing heart and the dizziness on standing are not a life sentence riding alongside your fatigue. They are the same collapse, showing up in your circulation. Which means they sit downstream of the same terrain you can actually work on. Not by airing up the tyre one more time, but by fixing what keeps it flat.
If you want the full map of how the energy, the temperature, the viral load, and the autonomic chaos all connect and reverse together, start with the full recovery picture. That is the roadmap this fits into.
When you are ready to go deeper, the Scorch Protocol lays out the whole approach. And because POTS is exactly the kind of case that should be individualized, you do not have to guess at how it applies to you. You can get personalized guidance in the members portal, where your version of this answer starts from your labs, your meds, and your actual history, with me reviewing it before it reaches you.
You have been standing up against gravity and a broken system for long enough. Let us fix the engine, not just the tyre.
Educational content only. This is not medical advice. Talk to a licensed clinician before any fast, hormone therapy, or medication change. Dry fasting with POTS requires caution and supervision because of hydration and electrolyte demands.