Sudden feeling of powerlessness after injector in arm

Patient

Q: Hello im 22y old healty male.
When I donate blood I feel nothing bad up untill around 300ml and i really ok with any injectors, even with that larger one used for donations. It's also ok when they take small samples before that.I feel no bad at all.
however
when i go to hospital and they put a small needle to take a number of samples, or just when they put that plastic part to connect a serum bag, right after they put it in my arm, suddeny i feel very powerless, that it's even hard to keep sitting position on a chair, strong nausea, feeling cold and sweating.
these all happen exact the same order everytime and all happen no more than 5 minutes. last time it took some time enough to fill two tubes of samples 6ml each.
Also i feel worse when they jiggle the needle while inside my vein. is this related to this terrible feeling? It's the same since my childhood. i cant understand it.
Do you know the reason why this is happening? is there a way to prevent it? I want to understand how and why this thing happens. I look forward to get a detailed explanation on this problem. Thank you!

Doctor

A:   This question is currently in queue and will be answered shortly by one of our doctors. In the meantime you may browse our library of answered questions by clicking here.

Related Q&A

Q: I have had continuous lower back pain for the past few months that has not been resolved. I went to a chiropractor a...

Q: I am awaiting an MRI due to what my Doctor thinks could be a trapped nerve. I've had pins and needles, pain and weakn...

Q: I had sex for the first time with my now ex gf (unprotected) and barely 3days after, i noticed peeling on my penis ...

Q: A couple days ago I was preparing dinner on my stove. while i cutting chicken on one burner which i thought was off ,...

Q: I recently had lab work done. Some of it was abnormal. I have an ANA of 1:5120 and an anti DNA ds or >800. Does...

 
DOCTOR ADVISORY BOARD
218

Dr. James Obaji M.D.

  • 247 Reviews
  • Family Physician
173

Dr. Suneel Sharman M.D.

  • 190 Reviews
  • Family Physician
138

Dr. Pat Golden M.D.

  • 169 Reviews
  • Cardiologist
98

Dr. Kunaal Jindal M.D.

  • 112 Reviews
  • Plastic Surgeon
CNN
BBC
MSNBC
CBS
abcNews
FoxNews