It's odd the way the body acts sometimes. I'm someone who can faint quite easily over these kind of things.. it started at my 7th year of primary school when we were due to have injections later in the afternoon and a bunch of my friends were talking about feeling sick afterwards and how it happens to some people. I hadn't had an injection since I was about 5 years old and I couldn't remember it much but I know I didn't feel faint. I think I just though of it as 'ouch that's sore I don't like it'. Anyway, on this occasion in school when it came time to have the injection I went and got it, the woman put a small plaster on me as I bled a bit and then I left the room and returned to class.. a few minutes later and I was feeling light headed and told my friends who took me to the teacher and I was taken back to nearby where the injections were happening to sit with a few others who were also feeling ill. I never properly fainted that day but I felt sweaty, light headed and dehydrated. I asked the school nurse for a drink but she said it would only make me feel worse.. I beleived her but later found out it was what I really needed hence the sweating and feeling thirsty! After 15 minutes I was 100% and returned to class like any normal day.
Ever since this occasion I've been prone to fainting easily at things involving blood, and needles etc. I'm not scared of needles and I can go and get injections done no bother but for some reason I always feel faint afterwards. Blood doesn't bother me in small amounts and only effects me on occasions where it is a great amount and can be on myself or others.
The next occasion I had anything done after school was when I had my ears peirced. I went to the shop, got them pierced, left and then again walking down the road I told my mum and friend I wasn't feeling good. About 10 minutes of sitting on a railing and having a bottle of water and I was ok.
I returned to that piercing shop to have them checked and taken out to put new ones in some time after and the woman who tried to remove them nipped my ear and for some reason my nody decided this was even more worthy of fainting than the piercing itself. I woke up on the floor with my mum and two shop woman around me asking if I was ok. I just felt so embarrassed. I left and went home and my dad removed my earrings without hurting me and I didn't feel ill.
The next time I got a jag was the BCG jag in school years later which involved a skin test (6 small needle things pressed onto the arm) and I got that done and it didn't bother me at all not the slightest faint feeling. I thought I was cured and returned for the actual jag only to feel a little dizzy. Again, this was after leaving as I walked back to class. I just sat in an empty corridor for 5 minutes and it passed and I went into class like nothing happened.
One time I got a jag at the doctors a few years after and I got the jag and didn't feel faint at all. The next time I went was a few years later again and I did feel faint but not enough to actually faint. It seems like my body differs a lot. I got my belly peirced last year and just felt a bit light headed for 15 minutes afterwards and then I was fine and left.
I wish I knew a way to stop it happening I just find it really embarrassing more than anything and it's stupid because there's nothing to worry about, you're body does it to shut down from something really bad and I know deep down that it's only a little injection and it'll be over in moments and I'm going to be totally fine.