system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What's going on when i get the pins and needles feeling in my hands and/or feet?
gpt
Most likely you've put pressure on a nerve and this is blocking its ability to signal correctly.  Different nerves turn back on when the pressure is relieved in different orders hence you'll feel burning sensations, prickling, etc as the nerves fire back up and do a sort of test run.