I rarely get it but today I did about 100mgs and did it fairly quickly, whole thing was over in about 10 seconds. I really don't see how I could have hit a vein at all...my hands are perfectly steady, I stick quickly and pull back. Air bubbles, no blood, so I am not in a vein. After that I pull out quickly and there is no blood whatsoever, you cannot even see the mark. What could it be?

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