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What Causes Sudden Numbness In The Foot?

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Posted on Tue, 12 Jul 2016
Question: My left foot feels like it's asleep off and on for roughly the past two weeks. What could be causing this? Only on the left side by the way. Should I be concerned?
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Answered by Dr. Ishu Bishnoi (2 hours later)
Brief Answer:
Cause and approach

Detailed Answer:
Hi XXXXXXX ledenbach, thanks for asking from HCM.


I can understand your concern. If your left foot feels numb and it is persisting, you should be concerned. It could be due to

: Diabetic neuropathy

: Sciatic nerve compression

: Posterior tibial nerve compression

: Peripheral sensory neuropathy due to B12 deficiency, alcohol, toxins

: Syrinx

You should observe or consult neurologist for any sensory loss to touch, pain, temperature over left foot. It will further confirm diagnosis and need for evaluation. The neurologist will examine your nervous system and may advise

: MRI lumbar spine
: Nerve conduction velocity
: Blood sugar, B12 level

Further management will depend upon diagnosis. If you have any doubt, do let me know, I would be happy to help you.

Thanks. Take care.
Above answer was peer-reviewed by : Dr. Raju A.T
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Answered by
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Dr. Ishu Bishnoi

Neurologist, Surgical

Practicing since :2007

Answered : 901 Questions

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What Causes Sudden Numbness In The Foot?

Brief Answer: Cause and approach Detailed Answer: Hi XXXXXXX ledenbach, thanks for asking from HCM. I can understand your concern. If your left foot feels numb and it is persisting, you should be concerned. It could be due to : Diabetic neuropathy : Sciatic nerve compression : Posterior tibial nerve compression : Peripheral sensory neuropathy due to B12 deficiency, alcohol, toxins : Syrinx You should observe or consult neurologist for any sensory loss to touch, pain, temperature over left foot. It will further confirm diagnosis and need for evaluation. The neurologist will examine your nervous system and may advise : MRI lumbar spine : Nerve conduction velocity : Blood sugar, B12 level Further management will depend upon diagnosis. If you have any doubt, do let me know, I would be happy to help you. Thanks. Take care.