Small fiber neuropathy can cause burning, tingling, numbness, electric pain, temperature sensitivity, and autonomic symptoms, even when standard nerve testing is normal.
Small fiber neuropathy (SFN) can cause burning pain, tingling, numbness, and autonomic symptoms that are often difficult to diagnose with standard nerve tests. Dr. Nino explains how SFN is evaluated, its connection to autoimmune and other underlying conditions, and the importance of a comprehensive approach to treatment.
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I’d like to talk about small fiber neuropathy because it’s a condition that can be very real for patients but often difficult to recognize at first. Small fiber neuropathy, or SFN, affects small fibers in the body. These nerves are responsible for things like pain, temperature sensation, and part of the autonomic nervous system, which controls functions like heart rate and digestion.
When these fibers are not functioning properly, people can experience symptoms like burning pain, tingling, numbness, or heightened sensitivity, often in the hands or feet. Some patients also notice more systemic symptoms like changes in sweating, heart rate, or gastrointestinal function.
One of the challenges with small fiber neuropathy is that standard nerve tests can appear normal, which can make it frustrating for patients who know something is not right. That’s why a diagnosis often requires a more specialized approach, sometimes including skin biopsy or other targeted testing along with a careful review of symptoms and history.
Small fiber neuropathy can be associated with a variety of underlying conditions including autoimmune disorders, metabolic disease, infections, or even idiopathic causes where we don’t find a clear trigger. Treatment focuses on managing symptoms, supporting nerve health, and, when possible, addressing the underlying cause.
At Manhattan Pain Medicine, we take a coordinated, whole-body approach because these symptoms often overlap with other conditions like POTS, MCAS, or autoimmune diseases. If you have been experiencing burning pain, unusual nerve sensations, or symptoms that don’t quite fit into one category, this may be something worth evaluating.
Small fiber neuropathy, often called SFN, is a nerve condition that affects small sensory and autonomic nerve fibers. These nerves help carry pain, temperature, and body-signal information, and they also help regulate automatic functions such as sweating, blood pressure, heart rate, digestion, and temperature control. SFN often causes burning pain, tingling, numbness, itching, electric sensations, or skin sensitivity, most commonly in the feet or hands, though symptoms can also be patchy, widespread, or involve autonomic symptoms.
At Manhattan Pain Medicine, evaluation begins with the full symptom pattern, not one test result. For patients looking for small fiber neuropathy treatment in Manhattan or NYC, MPM considers whether symptoms may be related to autoimmune or inflammatory disease, Sjogren’s syndrome, lupus, vasculitis, rheumatoid arthritis, psoriasis-related inflammation, POTS or autonomic dysfunction, fibromyalgia overlap, gastrointestinal dysmotility, medication effects, metabolic conditions, vitamin deficiency, post-viral symptoms, or complex chronic pain.
MPM evaluates small fiber neuropathy-related pain through a diagnosis-first lens. The goal is to understand whether burning, tingling, numbness, electric pain, temperature sensitivity, dizziness, sweating changes, constipation, gastroparesis, heart rate symptoms, or widespread pain may reflect small fiber involvement, another neuropathy pattern, autoimmune disease, dysautonomia, fibromyalgia, medication effects, or a separate neurologic condition.
Care may include medication management, pain psychology, biofeedback, acupuncture, infusion-based options when clinically appropriate, ketamine therapy or lidocaine and ketamine infusions for selected neuropathic pain patterns, and coordination with neurology, rheumatology, gastroenterology, autonomic specialists, and primary care when needed.
Small fiber neuropathy can be difficult to diagnose because standard EMG and nerve conduction studies primarily assess larger nerve fibers. In pure small fiber neuropathy, those tests may be normal even when symptoms are significant. Skin biopsy, autonomic testing, bloodwork, and specialist evaluation may be considered depending on the clinical picture.
This can be frustrating for patients who feel burning pain, tingling, pins and needles, temperature sensitivity, dizziness, sweating changes, gastrointestinal symptoms, or body-wide nerve discomfort but have been told that testing is normal.
MPM’s role is to help map the symptom pattern, review prior workups, identify treatable contributors, and coordinate care when autoimmune, autonomic, inflammatory, gastrointestinal, or complex pain overlap is present.
Small fiber neuropathy fits within MPM’s Complex Chronic Pain, Autoimmune and Inflammatory, Autonomic dysfunction, and Psychology of Pain frameworks. Some patients have primarily sensory symptoms, such as burning pain or tingling. Others have autonomic symptoms, such as dizziness, sweating changes, heat intolerance, heart rate changes, constipation, gastroparesis, or bladder-related symptoms.
MPM evaluates these symptoms carefully and avoids assuming that all burning pain, dysautonomia, GI symptoms, or fibromyalgia-like pain is caused by SFN. The goal is to identify the most likely contributors and coordinate care across the right specialties when autoimmune, neurologic, autonomic, gastrointestinal, or chronic pain drivers overlap.
These guys are the best. I've been going here for over 6 years and their familiarity with my Schwannomatosis (most ppl have never even heard of it - its rather rare) and their ability to diagnose my CRPS quickly and accurately and then treat it like I was merely getting a flu shot is just incredible...
Highly recommended for those who need Pain Management. Everyone at Manhattan Pain Medicine is extremely nice and helpful. I have had very good interactions with both Dr. Siefferman and Dr. Louis. All of the staff is very responsive. 5 stars.
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I genuinely can’t say enough good things about the team at Manhattan Pain Medicine. I have MCAS, EDS, and an inflammatory autoimmune disease, and I’ve basically been searching for answers since I was a kid. I had years of unexplained inflammation markers, chronic pain, and allergic reactions despite...
I have a complex medical history and have seen a lot of doctors over the years. Dr. Mikaberidze and Dr. Siefferman each took the time to really listen and understand everything I had been dealing with. I also appreciated how they work together and communicated about my care. I left with a plan that...
Sharing my gratitude for the pleasant experience last week during my visit, the medical team provided great care and also treated my session as a learning experience, I left my session with a wealth of knowledge. A big thank you to the kind, and professional staff who welcomed me to the office as a...
I cannot say enough good things about Manhattan Pain Medicine. From the moment I walked in, I felt truly cared for and taken seriously. Dr. Nino Mikaberidze, Director of Rheumatology, is exceptional — knowledgeable, compassionate, and incredibly thorough. She takes the time to listen, explains every...
Dr Siefferman is the most thorough, patient doctor I have even been to. Currently I travel from miami to nyc to see him because his bed side manner and desire to help is incomparable.
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This practice is wonderful. I have been a patient of Dr. Siefferman’s since 2019 and he’s extremely helpful and kind. He has brought in a Rheumatologist who is also great. They handle very complex pain issues and always try to find new ways to help me.
Dr. Siefferman is an incredible doctor! He is extremely diligent and knowledgeable. It feels like you are his only patient. He invests a lot of time and effort into your injuries and concerns. I did not find these wonderful qualities with other pain specialists before, who were always rushed and som...
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Dr. Siefferman is a doctor who combines the old world bedside manner of doctors from my childhood (60 years ago) with a sta te of the art embrace of modern technology. It is always a pleasure to have an appointment with him...always has options and solutions to my medical issues. He is truly the doc...
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Dr. Siefferman is a genius. He is very informed and listens attentively.
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Dr. Siefferman and his entire team continue to be efficient, dedicated, and driven by precision and a genuine desire to give fantastic care. Will always recommend.
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Doctor Siefferman is fantastic. Have been seeing him for 5 years. Couldn’t recommend more.
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Dr. Siefferman is the ONLY doctor who has ever been able to diagnose my pain and treat it. He is hands down the best
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Small fiber neuropathy is a condition that affects small nerve fibers involved in pain, temperature sensation, and automatic body functions. These nerves include small sensory fibers and autonomic fibers. When they are damaged or irritated, patients may feel burning pain, tingling, numbness, electric sensations, itching, temperature sensitivity, or autonomic symptoms such as sweating changes, dizziness, heart rate changes, or digestive issues.
Small fiber neuropathy often feels like burning, tingling, pins and needles, stabbing pain, electric pain, itching, numbness, frostbite-like discomfort, or skin sensitivity. Symptoms often begin in the feet or hands, but they can also be patchy, widespread, intermittent, or involve other parts of the body. Some patients notice that symptoms are worse at night or during rest.
Yes. Burning pain is one of the most common symptoms associated with small fiber neuropathy. It may affect the feet, hands, legs, arms, or other areas depending on the pattern of nerve involvement. Burning pain should still be evaluated carefully because similar symptoms can come from peripheral neuropathy, nerve entrapment, spine-related nerve compression, autoimmune disease, vitamin deficiency, medication effects, or central pain mechanisms.
Yes. Small fiber neuropathy can affect autonomic nerve fibers, which help regulate automatic body functions. Symptoms may include abnormal sweating, heat or cold intolerance, dizziness, heart rate changes, blood pressure changes, constipation, gastroparesis-like symptoms, urinary symptoms, or other body regulation issues. These symptoms may require coordination with neurology, autonomic specialists, cardiology, GI, rheumatology, or primary care depending on the pattern.
Small fiber neuropathy can be associated with autoimmune or inflammatory conditions in selected patients. These may include Sjogren’s syndrome, lupus, rheumatoid arthritis, vasculitis, psoriasis-related inflammatory disease, undifferentiated connective tissue disease, or other immune-mediated conditions. Autoimmune small fiber neuropathy requires careful evaluation because treatment depends on the underlying condition, objective findings, symptom severity, and specialist input.
It can be. Sjogren’s, lupus, rheumatoid arthritis, vasculitis, and other inflammatory diseases may be associated with neuropathic symptoms or small fiber involvement in some patients. This does not mean every patient with burning pain has autoimmune SFN. MPM evaluates the full clinical context, including autoimmune history, lab findings, neurologic symptoms, autonomic symptoms, medication history, and prior rheumatology or neurology workup.
Small fiber neuropathy and POTS-like symptoms can overlap in some patients, especially when autonomic fibers are involved. Symptoms may include dizziness, heart rate changes, temperature intolerance, sweating changes, fatigue, GI motility symptoms, or exercise intolerance. MPM evaluates whether pain and autonomic symptoms may be related, separate, or part of a broader pattern requiring coordinated autonomic, neurologic, and pain-focused care.
EMG and nerve conduction studies mainly evaluate larger nerve fibers. Small fiber neuropathy affects smaller sensory and autonomic fibers, so standard testing may be normal in pure small fiber involvement. A normal EMG does not automatically rule out SFN, but it also does not confirm SFN. Additional evaluation may include skin biopsy, autonomic testing, laboratory screening, imaging review, and specialist assessment when appropriate.
Diagnosis usually begins with a detailed history, symptom pattern review, neurologic examination, medication review, autoimmune and metabolic risk assessment, and review of prior testing. Depending on the clinical picture, evaluation may include skin biopsy to assess small nerve fiber density, autonomic testing, bloodwork for underlying causes, EMG or nerve conduction studies to assess larger nerve fibers, and coordination with neurology or rheumatology.
Treatment depends on the suspected cause and symptom pattern. Care may include treating an underlying condition when identified, medication management for neuropathic pain, topical therapies when appropriate, sleep and function support, acupuncture, biofeedback, pain psychology, and coordinated care with neurology, rheumatology, GI, or autonomic specialists. Some patients with refractory neuropathic pain may be considered for infusion-based options only after careful evaluation.
In selected immune-mediated neuropathies, infusion or immune-based therapies may be considered by the appropriate specialist, but they are not universal treatments for small fiber neuropathy. NINDS notes that IVIg is used for some autoimmune-related peripheral neuropathies, but treatment selection depends on the diagnosis, objective findings, immune markers, risks, and specialist evaluation.
Ketamine therapy or lidocaine and ketamine infusions may be considered for selected neuropathic pain or complex chronic pain patterns after careful clinical evaluation. These treatments are not standard for every patient with small fiber neuropathy and should not be understood as treating the underlying nerve disease itself. Appropriateness depends on diagnosis, medication history, medical risks, symptom severity, goals, and clinician supervision.
Nerve pain symptoms should be evaluated urgently if they are associated with new weakness, rapidly spreading numbness, trouble walking, loss of balance, bowel or bladder dysfunction, saddle anesthesia, fainting, chest pain, shortness of breath, severe allergic symptoms, fever, sudden neurologic changes, severe back or neck pain with neurologic symptoms, or rapidly worsening symptoms.
Before care begins, our team helps patients understand the practical side of treatment, including insurance verification, out-of-network benefits, cost-share estimates, self-pay options, and billing questions. We believe patients should have as much clarity as possible before moving forward.
Small fiber neuropathy is a condition involving the small nerve fibers that help carry pain, temperature, and autonomic signals. These fibers include A-delta and C fibers. When they are damaged or irritated, symptoms may include burning pain, tingling, numbness, itching, stabbing pain, electric sensations, temperature sensitivity, or skin sensitivity. Symptoms often begin in the feet or hands, but they may also be patchy, widespread, or involve other regions.
Some patients experience mostly sensory symptoms, such as burning, tingling, pins and needles, numbness, itching, or electric pain. Others also experience autonomic symptoms because small autonomic fibers help regulate body functions. These symptoms may include sweating changes, heat intolerance, dizziness, heart rate changes, blood pressure changes, constipation, gastroparesis-like symptoms, bladder symptoms, or abnormal temperature regulation.
This overlap can make SFN difficult to recognize. A patient may first be evaluated for fibromyalgia, POTS, peripheral neuropathy, autoimmune disease, GI dysmotility, anxiety, spine pain, or unexplained chronic pain before small fiber neuropathy is considered.
Small fiber neuropathy can be missed because standard EMG and nerve conduction studies often focus on large nerve fibers. In pure small fiber neuropathy, those studies may be normal. This can leave patients confused when they have significant burning pain or autonomic symptoms but are told their nerve testing is normal.
A normal EMG does not prove that symptoms are psychological, and it does not automatically rule out small fiber neuropathy. At the same time, SFN should not be diagnosed from symptoms alone. A careful evaluation may include history, examination, prior testing review, laboratory screening, skin biopsy, autonomic testing, and coordination with neurology or rheumatology when appropriate.
Small fiber neuropathy may be idiopathic, meaning no clear cause is found. It may also be related to metabolic conditions such as diabetes or impaired glucose tolerance, vitamin deficiencies, thyroid disease, infections, medications, chemotherapy, toxins, hereditary conditions, autoimmune disease, or inflammatory disease.
In MPM’s patient population, symptoms often need to be evaluated in the context of autoimmune-related pain, Sjogren’s, lupus, rheumatoid arthritis, vasculitis, undifferentiated connective tissue disease, psoriasis, MCAS-like symptoms, POTS, gastroparesis, chronic constipation, fibromyalgia, post-viral symptoms, and complex chronic pain. The purpose of evaluation is not to force all symptoms into one diagnosis, but to understand the most likely contributors.
Small fiber neuropathy may be associated with autoimmune and inflammatory disorders in selected patients. This is especially relevant when neuropathic pain appears with dry eyes or dry mouth, joint pain, rashes, inflammatory symptoms, abnormal immune markers, vasculitic symptoms, or a known rheumatologic diagnosis.
When autoimmune small fiber neuropathy is suspected, coordination with rheumatology and neurology may be important. Treatment may involve addressing the underlying inflammatory or autoimmune condition, managing neuropathic pain, improving function, and monitoring for changes over time. Immune therapies, biologics, or infusion-based treatments should only be considered when the diagnosis and specialist evaluation support that approach.
Some patients with small fiber neuropathy also report autonomic symptoms, such as dizziness, heart rate changes, sweating abnormalities, heat intolerance, GI motility symptoms, or blood pressure changes. These symptoms can overlap with POTS or other forms of dysautonomia.
MPM evaluates whether neuropathic pain and autonomic symptoms may be related, separate, or part of a broader syndrome. This may require coordination with autonomic specialists, cardiology, neurology, GI, rheumatology, or primary care, depending on the patient’s presentation.
MPM begins with symptom mapping. This includes the location of pain, character of symptoms, triggers, timing, autonomic symptoms, GI symptoms, skin sensitivity, prior testing, medication history, autoimmune history, metabolic risks, post-viral history, and functional impact.
The evaluation also considers whether symptoms may reflect peripheral neuropathy, peripheral nerve entrapment, radiculopathy, central pain syndromes, fibromyalgia, medication effects, thyroid disease, vitamin deficiency, inflammatory disease, or another neurologic condition. This broader approach helps avoid both underdiagnosis and overdiagnosis.
Treatment depends on the suspected cause and the dominant symptom pattern. When an underlying cause is identified, addressing that cause is an important part of care. Pain-focused treatment may include medication management, topical therapies when appropriate, acupuncture, biofeedback, pain psychology, sleep support, function-focused strategies, and coordination with other specialists.
For selected patients with refractory neuropathic pain, infusion-based care, ketamine therapy, or lidocaine and ketamine infusions may be discussed only after careful evaluation. These treatments are not appropriate for every SFN patient and should not be presented as treating the underlying nerve disease itself.
Pain psychology and biofeedback can be helpful for patients with chronic neuropathic pain, autonomic symptoms, medical trauma, symptom fear, sleep disruption, or nervous system hypervigilance. These tools do not mean the pain is imagined. They support nervous system regulation, coping, function, and quality of life when pain has become persistent and disruptive.
Patients should seek urgent evaluation for new weakness, rapidly spreading numbness, trouble walking, loss of balance, bowel or bladder dysfunction, saddle anesthesia, fainting, chest pain, shortness of breath, severe allergic symptoms, fever, sudden neurologic changes, or rapidly worsening symptoms. Neuropathic symptoms can overlap with serious neurologic, vascular, infectious, inflammatory, metabolic, spinal, or systemic conditions.
MPM approaches small fiber neuropathy through diagnosis-first care. The goal is to identify whether symptoms are most consistent with SFN, another neuropathy pattern, autoimmune or inflammatory disease, autonomic dysfunction, fibromyalgia overlap, GI dysmotility, medication effects, spine-related nerve irritation, or complex chronic pain.
For patients looking for small fiber neuropathy treatment in Manhattan or NYC, MPM offers a coordinated pain medicine perspective focused on symptom mapping, pain control, functional improvement, and collaboration with neurology, rheumatology, GI, autonomic specialists, and primary care when needed.
