Can Local Anesthesia Used in Surgery Cause Hair Loss? Will my Hair Grow Back?

I had upper and lower bleph surgery and a mini-lift just this April 2012 and had local anesthesia (where I was still awake and could talk) and have noticed a dramatic loss of my hair - I used to have very long and abundant hair (not thick but fine) and it has always grown quickly. It seems since August it has thinned out to the point where I can see my scalp! I noticed a huge amount of sebum build up - is there a connection between this and the surgery back in April and will my hair grow back?

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