Reta skin effects, extra sensitive to needles?

[desinr-gal]

I have been pinning peps since may, EOD. I generally feel no pain, and then after awhile I started feeling a stab in some spots.. But since starting reta a few weeks ago, I now feel a sting each time I get a needle even close to my skin! I have to test poke around until I find a safe spot.
Could it be Reta? or the KLOW I started a week ago??