On a side note, if you notice in ur labs your hematocrit and hemoglobin creeping up...AND ALL other avenues have been explored....don't rule out obstructive sleep apnea as a cause. Chronic oxygen deprivation will elevate these numbers...obviously along with other more common factors such as, dehydration, too high of trt dose, genetic predisposition for erythrocytosis or hematochromatosis,etc...if on a budget and or no insurance, you can find cheap cpaps on craigslist vs having to go to sleep study...its just pressurized air...that medical lobbyists push to have a script for. Usually these are also good for example, pilots and truck drivers whose livelihood depends on not having a diagnosis for OSA, etc or anyone not wanting to take a hit on insurance policies due to obstructive sleep apnea diagnosis.