# Question about donating blood **URL:** \ **Category:** Factual Questions\ **Created:** [November 25, 2007, 5:00pm UTC](https://boards.straightdope.com/t/question-about-donating-blood/427710 "2007-11-25T17:00:18Z")\ **Posts on this page:** 3\ **Page:** 2
**Author:** ![gigi](https://avatars.discourse-cdn.com/v4/letter/g/a587f6/32.png) [@gigi](https://boards.straightdope.com/u/gigi)\ **Post date:** [November 27, 2007, 3:43pm UTC](https://boards.straightdope.com/t/question-about-donating-blood/427710/21 "2007-11-27T15:43:15Z")
Thanks, Vlad. I was pretty sure there was scar tissue under the skin too, after all these donations. ---
**Author:** ![Plynck](https://avatars.discourse-cdn.com/v4/letter/p/3e96dc/32.png) [@Plynck](https://boards.straightdope.com/u/Plynck)\ **Post date:** [November 27, 2007, 3:51pm UTC](https://boards.straightdope.com/t/question-about-donating-blood/427710/22 "2007-11-27T15:51:04Z")
[QUOTE=Vlad/Igor] The needle, when it first goes in can either get stuck, meaning I have to push harder, or it pushes through layers of fibrotic scar tissue, “hitching” on each layer. It’s a sensation not unlike pushing sharp scissors through two or three sheets of paper held taut. Normally, I feel the resistance of needle give slightly when it enters the lumen of the vein, and I know to stop. That sensation is much harder to pick up on with scar tissue between the skin and the lumen of the vein, and that’s when I start sweating: am I in or not? [/QUOTE] I think I see why you chose “Vlad” as your user name… ---
**Author:** ![Vlad\_Igor](https://avatars.discourse-cdn.com/v4/letter/v/7feea3/32.png) [@Vlad\_Igor](https://boards.straightdope.com/u/Vlad_Igor)\ **Post date:** [November 27, 2007, 10:58pm UTC](https://boards.straightdope.com/t/question-about-donating-blood/427710/23 "2007-11-27T22:58:51Z")
[QUOTE=Plynck] I think I see why you chose “Vlad” as your user name… [/QUOTE] 😃 Yes, and Igor because I work in a research lab: “Yesss, mawstuh, I shall fetch the bodeee.” [Previous page](https://boards.straightdope.com/t/question-about-donating-blood/427710.md?page=1)