# Your falling-asleep foot shows how a nerve feels

Sit on your foot for a few minutes and it prickles when you stand. The
pricking comes from the nerve restarting its signal after pressure paused
it for a while.

The page at https://mariuscomper.uk/piciorul-care-adoarme/en/ shows the
mechanism in a simulation: choose how long you sat, press for pressure,
hold briefly, then release. A trace shows the nerve's activity, and dots on
the drawing show where the tingling lands.

## The mechanism, in brief

Sitting on your foot presses a nerve and pauses its signal for a while. The
blood feeding the nerve also reaches it more slowly while the pressure
holds.

While the signal fails to reach the brain, the area goes numb. That is why
the foot feels foreign when you try to stand.

After release, the nerve restarts gradually. The page's schematic shows the
restart as uneven bursts of signals, which the brain reads as pricking. The
bursts thin out within a few minutes, and usual feeling returns.

The trace and the timings are a schematic drawn for the screen, not a
measurement. Thresholds differ from person to person.

## When sitting cannot explain it

Numbness that stays after changing position, tingling that keeps returning
with no link to position, and numbness together with weakness or changes
in skin colour call for a doctor, not a page. See your GP.

## Sources

- Cleveland Clinic, Paresthesia factsheet (26 April 2023): https://my.clevelandclinic.org/health/symptoms/24932-paresthesia
- NHS, Pins and needles page (4 January 2024): https://www.nhs.uk/symptoms/pins-and-needles/
- DEXonline, “furnicătură” (DEX '09): https://dexonline.ro/definitie/furnic%C4%83tur%C4%83
- OpenStax, Anatomy and Physiology 2e (CC BY 4.0): https://openstax.org/details/books/anatomy-and-physiology-2e

© 2026 Marius Comper.