It took me a long time to convince myself of this, cause I thought I could make it work, but, there are two things that don’t work in pumping if you want to achieve permanent results.
The first is using high pressure. Although high pressure might give the impression of fast results and large results, the trauma that results from the high pressure cancels out any permanent result. The highest effective pressure seems to be right in the 5”hg area. Even though I used to pump way higher than this, I know now that my trauma line is crossed when I go to 6”hg.
The second thing that doesn’t work well is extended pumping without taking a break. Pump sets in the 10 to 15 minutes range seem to be optimum with jelq or massage breaks in between pump sets.
So, even though I have never heard of a thrombosed vein problem associated with pumping, if you can stick to the type of pumping routine that will actually give you the best results, you will not experience any trauma even close to a t-vein.