@tiredoldman This statement is the only thing I could find on SFN and cold:
“The symptoms of small fiber sensory neuropathy are primarily sensory in nature and include unusual sensations such as pins-and-needles, pricks, tingling and numbness. Some patients may experience burning pain or coldness and electric shock-like brief painful sensations. Since SFSN usually does not involve large sensory fibers that convey”
This is from Johns Hopkins medical journal on neuropathy
Is this cold sensitivity something new for you? Have you spoken with your doctor about it?

I have small fiber neuropathy and when your nerves are damaged in your skin, your body’s sensations to hot, cold, touch, pain, etc. are altered (heightened sensitivities, lesser feeling/numbness, new painful reactions, etc.). Your body’s communication network from brain to spinal cord to peripheral nerves (including small fibers) is not working normally so you get different signals and reactions to things. Small fiber neuropathy can affect much more than just skin, too.