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This is Dr. David
poor circulation or neuropathy damage to your nerves in your legs can cause your legs to feel like you are standing on nails.
you need to see a doctor and get your nerves evaluated with an MRI scan of your back and blood vessels evaluated with a doppler ultrasound scan of your legs to check for poor circulation and nerve compression causing your pains.
do you have a doctor you cans see who can do some testing for you?