How long will my leg be numb after a nerve block?

Nerve Block. The effect of limb numbness in nerve blocks depends on the nerve blocked, central vs nerve root, vs peripheral, the patients biological state of health to break down numbing agents, and the type of anesthetic used, for Lidocaine usually 1-2 hours, for Marcaine up to 6 hours centrally and longer peripherally, also nerve injury or bleeding in the nerve sheath can cause long term numbness.
Varies. As was said it depends on the drug used and the type of block done.

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