A 37-year-old member asked:
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why doesn't local anesthesia spread to the whole body?

1 doctor answer
Dr. Scott Mackinnon
32 years experience Anesthesiology
"Local" is why: "local" anesthesia does just that-a small dose of a numbing agent is injected near a nerve, that, when in a certain concentration, blocks impulses through that nerve. The result is numbness and weakness in the distribution of that nerve. This resolves as the local anesthetic is 'washed out" by blood and the localized concentration now will decrease-allowing the nerve to work again.
Answered on Jan 15, 2014
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