I have an ice cold left foot, which I've had for about 5 years. I'm 75. If I go for a decent walk it changes to burning. In bed at night it all goes away and I am like toast in the morning but comes back when I get up.
I was tested for all the usual suspects to no avail ( standard blood tests).I did have a debate about the accuracy of these tests eg for underactive thyroid or B12 deficiency but to no avail. I am very thin and lacking in muscle( I haven't always been like that). I feel cold all the time all over not just feet although my left foot is much worse. There is a debate about testing thyroid function and whether the standard is sufficient,etc but I'll leave that out here. Any comments would be helpful though.
I consulted a neurologist who was thorough, did MRI scans of brain and spine, nerve conduction study too. All ok except my spine had degenerative issues( normal for my age). He asked if i had leg pain . I didn't then so that seems to have led him to conclude I had small fibre neuropathy. He was unsure ( his speciality is dementia it turned out). He introduced me to a colleague who purportedly knew more. He rolled a spherical ball over my foot then told me I had a " neuropathy". That was it. My understanding is that, currently a skin biopsy is required to confirm small fibre neuropathy. He confirmed in writing that I had age related peripheral neuropathy. He never once mentioned small fibre neuropathy. I gave up at this point.
I had a lump on top of my left foot. I can't remember if it was apparent when I saw the neurologists; probably was..My GP referred me for an ultrasound scan. It was totally inconclusive so I got an MRI scan done. Again inconclusive but " could be a swelling on a tendon". The podiatrist suggested leaving for 4 months then getting another MRI scan. This I duly did then met the podiatrist with a colleague.
By then I had been told by a pedorthist I had fallen arches; " collapsed arch" in my left foot. To me, flat feet( adult acquired). I was by this time getting leg pain too. A friend told me he had had the same, quite debilitating, but that getting customised shoe insoles cured the pains for him. I did the same. They have helped to remove the leg pain too. I told the podiatrist all this but she was unconvinced. she kept insisting I had small fibre neuropathy ( I had told her that was the neurology diagnosis). My reading of all this is that a swelling on a tendon, acquired flat feet etc can lead to compression of the tibial nerve in the foot ( tarsal tunnel syndrome or such like).
This is a neuropathy albeit an unusual one. Could I have this. She was adamant I did not have this though so I gave up. But it still lingers....Meanwhile the parasthesia in my left foot persists. I get a little too in the right foot but not nearly so bad.
I've gone on enough. I may have missed bits but think I've set out the main points.
At times the sensations are almost unbearable and getting worse.
Does anyone have anything similar?

PS I did also get checked thoroughly for lumber stenosis by a specialist physiotherapist and was told I didn't have spinal stenosis, another potential reason for my ails.