alright gang, we need another win over the news mega this week! keep those numbers up and keep being trans as hell 
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I don't know, but honestly I wouldn't expect it to. I guess it depends on the size and depth of the scar, like maybe cleft lip repair scar that little area might not be as sensitive. But you still have the rest of your upper lip anyway. I have a great big scar on my knee from when I was a kid, basically can't feel it at all, no response when they check that reflex either (I always wonder if I limp slightly because of it)... I wonder if they'll just zap that small area so I have some first hand knowledge of if it hurts more or less over the scar area even though it's also completely hairless.
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Mine would be from straight razor cut that cut my lip in two.. it's a fine scar now but got it when I was a kid.
I have a very high tolerance to pain too so I always wonder