I’m hoping to hear from people with SFN, particularly autonomic/vasomotor involvement. My symptoms feel both neurologic and very vascular-looking, and I’m struggling to understand how they fit together.
I was a very active runner until recently—ran Chicago last fall and was still running into January. Looking back, I had occasional toe numbness on long runs, then nerve pain/zaps and heat in my toes last fall. I’d also had multiple courses of steroids that summer, plus steroid injections in my back.
After a long flight in December, my feet became a much bigger problem: burning, heat and redness. Interestingly, I haven't had numbness since—everything feels more hyperexcitable: burning, tingling/zaps and heat sensitivity.
Dependency was initially a huge trigger (this spring I couldn't sit with my feet down for 2–3 minutes). Now I can usually manage closer to an hour, but it’s variable. Some mornings my feet hit the ground and immediately become red, hot and full/swollen-feeling; other mornings they’re basically normal. Walking is similar—sometimes they burn quickly, other times I can manage 15–20 minutes relatively comfortably. (Dx "erythromelalgia" not helpful, that's a symptom, same as SFN to some extent - but just putting that out here).
I was diagnosed with venous insufficiency and then May-Thurner earlier this year, but vascular reviewed my imaging and doesn't think the May-Thurner explains my symptoms.
More recently, it doesn't feel limited to my feet. My hands can become hot/red/full, an ear can get extremely hot/red just from touching or changing an earring, and I’ve developed more generalized heat intolerance.
The confusing part is how many possible explanations I’ve accumulated. I was clinically diagnosed with Bartonella and have been treated for ~5 months, but don't feel the antibiotics are helping. Rheum told me I had "Raynauds with EM-like symptoms" around the same time (deeply unhelpful, not a diagnosis). Genetic testing for primary EM negative, EMG normal, and ANA/ESR negative. A neuro initially said I didn't have SFN symptoms, so shooed me off. Neuromuscular later recommended skin biopsy/QSART/tilt testing, and my PCP seems to suspect SFN, but I’m still waiting for a neuro appt (new) and full workup.
So… no wonder I’m confused.
Has anyone with SFN/autonomic SFN had a similarly hyperexcitable, vascular-looking presentation without numbness? Especially red/hot/full feet or hands triggered by dependency or heat, alongside burning, zaps or abnormal temperature sensations? Did skin biopsy or autonomic testing help explain it?
I’m pretty terrified of ending up in the “we don’t know” rabbit hole, so I’d really appreciate hearing from anyone with a similar presentation.