Ugh! Biopsy!! That sounds like an ouch. Let them do a physical testing with the 2-pronged whatchamacallit...looks like a tuning fork, hooked up to electricity. Had it done 3 times...no doctor wanted to believe the other doctors? I was lying about it? They never told me why the repeat. But you never mentioned Raynaud's.....yeah, I have that as well....
I used to come in from the cold, back in my NH days, with bright red and very cold nose, toes, ears, and hands. Now it's frozen-cold feet, always, socks and shoes or boots, even indoors , the ears are a bit less likely to be freezing only because I'm more likely to cover them well outdoors, but they are rarely warm to the touch...nose is usually cold to the touch, sometimes it's a big pain on my face, and not a nose, and my hands need constant warming unless I'm taking the doc's advise: get into a warm bed. Stay warm. Oh. And all of it hurts most of the time. What fun. Research it online...then you might decide to ask a Neurologist or Rheumatologist about it...or maybe a Podiatrist. I have all three kinds of docs. Don't really remember, but I think the original maybe/diagnosis came from a GP in NH.