- Peripheral nervous system diseases are a category of disorders characterized by damage or dysfunction of the peripheral nerves outside the brain and spinal cord, encompassing various types.
- Causes or related factors may include diabetes, trauma, infection, autoimmune diseases, kidney and liver diseases, certain drugs and toxic substances, nutritional imbalances, and genetic factors; in some cases, the cause remains unidentified.
- Damaged peripheral nerves may fail to properly transmit motor, sensory, and autonomic signals between the brain and the body, or transmission may be interrupted.
- Typical manifestations include numbness, pain, and decreased sensation in the hands and feet, muscle weakness, and gait and balance problems; depending on the case, abnormalities in sweating, digestion, urination, and heart rate regulation may occur.
- Risks and prognosis vary depending on the underlying disease, the type and location of the affected nerves, the degree of damage, genetic background, and individual factors such as toxic exposure, alcohol consumption, and smoking.
- Symptoms can range from mild to severe and may progress rapidly over a few days or slowly over months to years; in some cases, improvement may occur after treatment of the underlying cause.
- Diagnosis is based on medical history, family history, and neurological examination, utilizing blood tests, genetic testing, neuro-muscular function tests, autonomic nervous system tests, biopsy, or CT/MRI as necessary.
- Test results must be interpreted along with symptoms, physical examination findings, medications, and comorbidities; it is difficult to confirm the cause or subtype through a single test alone.
- Management is structured toward controlling the causes of nerve damage, alleviating pain and functional decline, and preventing falls, compression, or additional injury.
- Treatment varies depending on the cause and severity, with options presented such as orthotics, topical agents, prescription drugs, non-pharmacological pain management, and surgery to reduce nerve compression.