I am surprised there have not been more thrombosed veins reported here, I just have to look at a clamp to get a thrombosed vein :)
I had to take 14 weeks off PE due to some thrombosed veins from clamping in May 2004. Not extreme clamping either. It works but I dare not ever clamp again.
I also get them from hanging with a BIB as it pulls the foreskin so I need to use a vacuum hanger that pulls from the glans without pulling the skin too much.
I will have to do a search on EVO, never heard of it before, ususlly take Aspirin, Ibuprofen, Nattokinase, Hirudiod cream and rest.