Had the same conversation with Primary a few years ago. Out of all the blood lab results, this one is mostly ignored. Lung doctor explained that the thicker blood is a result of low oxygen levels and continues to cause low levels with less blood flow. He mostly blamed it on smoking, which we already know. I try to just stay hydrated, but it's a repeating cycle, indeed.

The blood letting procedure is a special one performed by any major blood donation orgs. Insurance should pay with doctors Rx order. Unfortunately, the blood is wasted and cannot be used for normal catastrophy events like regular donations drives.

Danger is blood clots: legs, heart lungs.......none of them good and they are dangerous.

Thanks Jean for your response it’s very helpful
I’m told that draining a pint of blood helps to keep the count down it’s a management thing and not a cure.