Nerve Block Question
 

I received a nerve block injection last week as a diagnostic to find out if my headaches were caused by neuralgia. They really didn't help much at all, but the weirdest thing is, only half of my head went numb. The other half never did. So far the Doc who administered the shots AND my neurologist are stumped by this. I was wondering if anybody here ever had that happen, or know someone who did?

Thanks in advance,
Scott