So this week I have been doing some regular manual stretching but I have noticed that I now have a small blister it seems like right underneath my head and sometimes this makes it difficult to grip and pull. Am I gripping my penis wrong or something to have this happen I just have been doing the standard ok grip and pulling as hard as I can?...The other question was every day I start to do manual stretching I seem to always have a lig pop is this a bad or good sign that I am pulling hard enough? Any thoughts or ideas with these issues would be of great appreciation to me. Thank you in advance.