on pins and needles, to be

be on pins and needles

To be anxious and tense. The phrase likely derived from the tingling sensation (called "pins and needles") that occurs when blood flow returns to a numb limb. A: "Why is Carrie pacing?" B: "She's waiting for the doctor to call with her test results, so she's been on pins and needles all day."See also: and, needle, on, pin

on pins and needles, to be

To be extremely nervous or uneasy; in suspense. The image is as clear as that of a cat on a hot tin roof. Robert Louis Stevenson appears to have been the first to use it metaphorically, in St. Ives (1897): “He was plainly on pins and needles.” It was a cliché by the mid-twentieth century. See also on tenterhooks.See also: and, on, pin