Picture hundreds of tiny points pressing up from under the skin all at once — not a cut, not an , just sharp little prickles everywhere, and the whole body wanting to move. Both uses on this page are that. One is where the feeling really is, in a foot you sat on. The other is where English has put it, in a person who is waiting for news and cannot sit still.
Two branches
身上真的在刺
這一支是畫面的原處：針尖真的在皮膚底下，在某一隻腳或某一隻手裡。
noun · B1
The prickly, tingling feeling you get in part of your body — most often a foot, leg, hand or arm — when the blood has not been flowing there properly, usually because you kept that part still or pressed under you for too long.
發麻、刺麻感
心裡靜不下來
同一片針尖被搬到等消息的人身上：怎麼坐都不對，一直想站起來走動。
noun · B2
If you are on pins and needles, you are so nervous that you cannot sit still or relax — usually because you are waiting to hear something important that you cannot do anything about.
坐立難安地等