Long COVID
Long Covid
The infection cleared months ago. So why do you still feel sick?
Crushing fatigue, brain fog, a racing heart, and symptoms that move around long after the virus is gone. Long COVID is real and measurable. It is what happens when an infection leaves the nervous system, the immune system, and the body’s energy machinery dysregulated, and it looks a lot like illnesses we already understand.
Start here
Start with why symptoms persist long after the virus clears, and why Long COVID overlaps so heavily with conditions like POTS, MCAS, and CIRS. This is the map for making sense of a moving target.
What Long COVID actually is
For most people a viral infection resolves and the body returns to baseline. In Long COVID it does not. The infection acts as a trigger that leaves several systems dysregulated at once: the autonomic nervous system that runs heart rate and blood pressure, the mast cells that govern the immune response, the mitochondria that produce energy, and sometimes dormant infections that reactivate.
That is why Long COVID rarely looks like one clean diagnosis. It shows up as POTS, as mast cell reactions, as crushing fatigue, as brain fog, often in the same person. The hopeful part of that overlap is that these are patterns we already know how to work with.
Symptoms patients bring us
- Crushing fatigue
- Brain fog
- Racing heart on standing
- Shortness of breath
- New sensitivities or rashes
- Sleep problems
- Exercise intolerance
- Symptoms that move around
10%
of people who get COVID still have at least one symptom six months later. For those hospitalized it is 70%.
Everything else on Long COVID.
Browse our library of articles on Long COVID and everything connected to it.















