I am injecting b12 into my thigh and the liquid is DARK. There is no way to tell if there is blood in the syringe when I pull back.. How can I aspirate correctly with this ? I know you can inject it in the vein but I am preparing to inject test so I want to get it right....


Also, do I need to to apply a bandaid to the injection spot immediately? If I don't attach a bandaid, can it get infected by rubbing on to my cloths later, etc