Somehow the more I read on this thread with what we are hearing it just seems like there are details of these pumping sessions that are totally absent. Somehow it sounds like we are only getting part of a story.
Miaboy, do us all a favor and go back and chronicle exactly what you did in these pumping sessions and do it in the form of a "timeline" so we can all get a more clear picture of the events leading up to what has happened to you.
Also, we need to know if you had at the time taken any common medications sold over-the-counter or if you had taken any prescription drugs before your pumping sessions. There are things that can have a really nasty effect on vacuum pumping. Again, you may not realize it, but the smallest and most minute detail might help the rest of us in solving your mystery and in preventing a possible injury to another person.
The details on this "loose skin" condition are not really clear in some ways.
When you pump, you draw lymphatic fluid into the tissues of the penis expanding them. If you were somehow to pump up to where the tissues were like a balloon and went so large that you caused the rupture of blood vessles and other related trauma then your injuries would tend to make more sense. Usually one blisters horribly long before this happens.
When I first got into pumping I tried the bathtub method and that was one of the times I did really seriously injure myself because in me it distorted the sensations and feelings in the penis. This was decades ago and it took me a couple of months away for things to heal. I was sore in the crotch for a while. I did not however get a permanent skin stretch. In many men this skin stretch would be a desirable thing and if the erectile mechanism is still working great then this in itself can be worked with other techniques to build tissue underneath and at least help you with your girth.
Many good men are trying to help you, and this is YOUR thread.
Take as much space as you want and detail the sessions very clearly and exactly that led up to your injuries.
Remember, if you managed to do something out of the ordinary here there are a number of others that you may be able to help by preventing similar injuries.
Again for me it just sounds like some details of the sessions themselves would be helpful.
Other members trying to help, wouldn't you tend to agree?