I know this has been asked before. However, does anybody know the scientific reason why there is a cough and a tingling feeling even before the plunger is at the bottom of the pin. It happened today and I am curious what is the definate(not just a quess)reason.
It happens with all gear but only every once in a while. I also check for a bruise the next day or so and I dont have one.....I cough and I get this feeling like someone is throwing hot sparks all over my body......Bizarre
Sounds to me like you went through a vein. I've gotten it before, you probably just have bad luck. I always aspirtate so I never actually inejcted into one, but there have been times where 4 or 5 injections in a row (over a period of weeks) I passed through a vein (I could tell by the amount of blood that came out).
Did you get a strange feeling in the back of your throat?