Are they doing it "out-patient", where you go home a couple hours afterwards? When I had skin grafts done to repair a finger years ago, the finger felt better than the graft site did (my bicep). I've not had too much of a problem with "minor" surgeries, but my skin does not heal like it did when I was younger, taking upwards of twice as long as I used to, to get "closure", shall we say? I've still got a bit of a scab on my knee from when I fell back in August. My diabetes contributes to that also tho. If you're sick, they will not (or shouldn't) operate, especially skin grafting. But you do want to get rid of a melanoma asap... How long has it been since you have blood work done, to see your cbc and lupus panel numbers? Has the surgeon consulted with your rheumy?
"There but for the grace of God, go I."
"... His mercy endureth for ever."