blood backfired into syringe while injecting?! after aspiration.

[nonidentity]

so I was in a hurry and tried to inject a LITTLE faster than normal, as usual in the quad when I started to feel a little pain/tightness I stopped pushing and waited for it to subside, but then blood started coming into the syringe?! WTF is this?? I've probably done over 200 injections "I love short esters with ED injections" and NEVER hit a vein "weird I know", and NEVER had blood to backfire like this after aspiration... what is this?

 

[nonidentity]

you hit a vein. no big deal. it happens. try not to stick that spot next time.

I think I might have damaged the tissue slightly, it was hurting after I pulled out. how did i hit a vein even after I aspirated?

 

[BigShadow]

I think I might have damaged the tissue slightly, it was hurting after I pulled out. how did i hit a vein even after I aspirated?

Prob on the way down. Couple days ago I had a slight bit of blood in the very top of the syringe after I pulled it out which was very fast btw. Must have hit a vein on the way in and blood must have went up the syringe maybe due to a vacuum effect when I pulled out. Weird either way!