Tingling, pins and needles, or numbness — called paraesthesia — is very common and usually benign. However, certain patterns are red flags for stroke, multiple sclerosis, or serious nerve damage.
Paraesthesia — the medical term for abnormal sensations including tingling, pins and needles, numbness, crawling, or burning sensations — is one of the most common neurological complaints seen in GP and neurology clinics. Most people experience temporary paraesthesia when a limb 'goes to sleep' from compression of nerves and blood vessels. This resolves within minutes of movement and is entirely benign.
Persistent paraesthesia, however, can indicate significant nerve pathology. Peripheral neuropathy — damage to peripheral nerves — is the most common cause and is frequently associated with diabetes (diabetic neuropathy), vitamin B12 deficiency, alcohol excess, and certain medications (particularly chemotherapy). Carpal tunnel syndrome causes numbness and tingling in the hand — specifically the thumb, index, middle, and ring fingers — especially at night. Cervical or lumbar nerve root compression (radiculopathy) causes shooting pain and tingling in the arm or leg respectively.
Neurological red flags requiring urgent assessment include sudden numbness affecting one entire side of the body (possible stroke), rapidly progressive numbness ascending the legs (possible Guillain-Barré syndrome), numbness with bladder or bowel dysfunction (possible spinal cord compression or cauda equina syndrome), and numbness with vision changes, speech difficulty, or weakness. In Korea, major hospitals' neuroscience centres provide neurological assessment including nerve conduction studies, MRI, and lumbar puncture.
Key Points
- Temporary 'pins and needles' from posture — entirely benign
- Diabetic neuropathy is the most common cause of chronic paraesthesia
- Carpal tunnel syndrome — numbness in hand, especially at night
- Sudden one-sided numbness — possible stroke, call 119
- B12 deficiency causes peripheral neuropathy — common in vegans and elderly
- Nerve conduction studies confirm nerve damage type and location
Causes & Risk Factors
- Postural nerve compression — temporary, resolves with movement
- Diabetic peripheral neuropathy — nerve damage from prolonged high glucose
- Carpal tunnel syndrome — median nerve compression at wrist
- Vitamin B12 deficiency — essential for myelin sheath maintenance
- Cervical or lumbar radiculopathy — nerve root compression from disc disease
- Multiple sclerosis — demyelination causing varied sensory symptoms
When to See a Doctor
- Sudden numbness on one side of face, arm, or leg — call 119 (possible stroke)
- Numbness affecting bladder or bowel control — call 119 (possible spinal cord injury)
- Progressive ascending numbness over hours/days (possible Guillain-Barré)
- Persistent numbness lasting weeks in diabetics
- Numbness with neck or back pain after trauma
For emergencies in Korea, call 119
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This content is published for educational purposes only. For accurate diagnosis and personalised treatment, consult a licensed KMA physician in Korea.
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Medical Disclaimer
This article is published by DoctorsInKorea.com for educational and informational purposes only. It does not replace a professional clinical evaluation by a licensed healthcare provider. For accurate medical diagnosis and personalised treatment paths, please book an appointment with a licensed KMA physician. For immediate life-threatening medical emergencies in Korea, please call 119.
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Last reviewed: March 1, 2025