Sorry to dredge up this old thread, but I’m having a similar issue. After performing manual stretches (which is pretty much all I do), I end up with lower back pain.
It’s not from posture or anything like that, it feels like pulling on the penis is stressing something deep within the body somewhere in the area of the lower back. I’ve stared at images of the internals - I can’t really tell what this could be.
… And this is without stretching too hard - or at least I think I’m not
For now, until I figure it out, no more length exercises for me (I can still do girth). It’s a shame because I made some incredible newbie gains: I started in Dec 2017 with a BPEL of around 5.75” and now I’m seeing 6.75” and very close to 7 if I have raging hard wood.
Does anyone know what this pain could be? BTW, the pain lasts for several days after a manual stretching session, so even if I stop, I have to wait for something in there to heal, it seems like.
Thanks for any insights!