Assessment of the peripheral nerves in patients with numbness, burning, or weakness in the hands and feet. Includes physical examination, blood tests, and EMG/nerve conduction studies.
Indication
- Numbness, burning, or tingling in the hands and/or feet
- Suspected nerve involvement (diabetic neuropathy) in diabetes
- Evaluation of entrapment neuropathies such as carpal tunnel or ulnar neuropathy
- Unexplained muscle weakness, muscle wasting, or foot drop
- Investigation of neuropathy related to vitamin B12 deficiency, kidney/thyroid disease, or alcohol
- Assessment of peripheral nerve involvement after chemotherapy
- Suspicion of Guillain-Barré syndrome or chronic inflammatory polyneuropathy (CIDP)
Preparation
- Note when symptoms began, where they occur (which finger/area), and how they affect daily life
- Bring a list of medications (especially chemotherapy, B6 supplements, phenytoin, and other nerve-affecting drugs)
- Share information about diabetes, kidney disease, thyroid disease, alcohol use, and family history
- If EMG is planned, do not apply cream/lotion to the skin and wear warm, comfortable clothing
- Inform the team in advance about blood thinner use and the presence of a pacemaker
How it's performed
- The physician examines touch, pain, temperature, and vibration sensation using standard methods
- Muscle strength, reflexes, and balance are evaluated; foot deformities and wound scars are checked
- Blood tests are ordered: complete blood count, fasting glucose/HbA1c, B12, TSH, kidney and liver function
- Nerve conduction studies (NCS) and electromyography (EMG) are performed to clarify the diagnosis or assess entrapment neuropathy
- In selected cases, autoimmune/paraneoplastic panels, immunoelectrophoresis, or genetic tests may be added
- A treatment plan is created based on the diagnosis (management of the underlying disease, neuropathic pain medications, physical therapy)
Post-procedure
- Follow-up with test results within 4-8 weeks of the initial evaluation
- Foot and sensory examination every 3-6 months in diabetic neuropathy
- Assessment of nerve recovery within 6-12 weeks after entrapment neuropathy surgery
- EMG may be repeated at intervals to monitor treatment response
- Urgent evaluation if a wound, infection, or rapidly progressive weakness develops
Risks
- Mild pain at the needle site during EMG, brief bruising, or rare bleeding
- Risk of small hematomas in patients on blood thinners
- Temporary discomfort from electrical stimulation during nerve conduction studies
- Very rarely, infection (minimized with sterile technique)
- Time required to reach a clear diagnosis and slow treatment response during the process
FAQ
Is EMG very painful?
Needle EMG can cause a brief stinging sensation; for most patients it is well tolerated. The nerve conduction part involves brief electrical impulses and is not painful.
Does peripheral neuropathy go away completely?
It depends on the underlying cause. In conditions such as B12 deficiency or entrapment neuropathy, treatment can produce significant improvement. In diabetic or genetic neuropathies, the goal is to slow progression and reduce symptoms.
Which vitamins help with neuropathy?
If there is a deficiency, B12 supplementation is effective; high-dose B6 taken without indication, however, can damage nerves. Blood levels should be checked before starting any vitamin supplementation.
What happens if I do not seek treatment?
Some neuropathies progress, leading to muscle wasting, foot ulcers, and balance problems. Early evaluation is important to prevent permanent nerve damage.
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