I also have been perspiring profusely. I perspire even if I am just sitting, and if there is any exertion, I am then soaking wet. My hands also tremble. I have just started with herbs. Since there is nothing known to cure this from covid, I am being treated for viral infections such as Epstein Barr. It takes a while as its three weeks on one, then another three weeks on another, blood test and finally three weeks on another. I will update. This is thru a functional medicine doctor who is also a regular MD--not someone who is adding this to his current practice--whatever that may be.