A piece of knitting that’s taken hours to achieve a length, can be returned to a ball of yarn in no time at all.
Ten hours of knitting? Can be undone in less than two minutes! But if it’s necessary? Wrong size, a mistake, wrong gauge, disappointing fabric, the wrong needle and/ or wrong stitch count.
My problem was I cast on 72 stitches for one sock then promptly forgot that I did so on the second. I cast on 64 stitches, my usual number. Rip, rip, rip! 8 stitches make a difference, in this case an inch in the circumference. You want matching socks. You NEED them to match as best you can . To fit! One thing I’ve learned is it will not remedy itself if you keep going. Face it! And rip. Carefully.
You just grit your teeth and do it. don’t think too much. No groaning.