the.com/numbing

the body's mercy switch, flipped when feeling becomes too much to bear

means Causing a loss of sensation or feeling, whether physically (cold, anesthetic) or emotionally (overwhelm that dulls you).

from From the verb 'numb,' which comes from Middle English 'nomen,' meaning 'taken' or 'seized' — the past participle of 'nimen,' to take. The idea was of a body part 'taken' or deprived of feeling, as if seized by cold or shock. The silent 'b' was bolted on later by writers who imagined a kinship with words like 'thumb' and 'dumb.' Distantly related to German 'nehmen,' to take.

cold trick
Ice works by slowing nerve signal speed
dental origin
Cocaine was the first local anesthetic in 1884
emotional version
Brains numb feelings too, not just nerves
pins and needles
That tingle is nerves waking back up
frostbite paradox
Severe cold feels warm before it kills tissue
for instance

lidocaine injections — local anesthetic used in ~300 million procedures annually worldwide

frozen lake michigan swim — polar plunge events in chicago where thousands immerse in near-freezing water

novocain dental anesthetic — procaine-based numbing agent used by dentists since 1905

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