Now we settle in for the actual mending.
But first things first, I was not in charge of this color selection. The original yarn is long gone, so I asked the sock’s owner if we should go with as close a match as possible, or something super high contrast. The vote went for super high contrast.
So I rummaged around in the scraps bin for something of a suitable weight and fiber content (generally you want to get something fairly close to your original yarn, though it’s not a hard and fast rule) and settled on this. Yellow and purple totally count as high contrast.
As for how I’m actually fixing the thin spot? It’s just duplicate stitch. Which I won’t teach you because I’m mean, and countless other (nicer) folks have already written up endless sets of instructions and I can think of no good reason to duplicate that work. But if you google something like ‘duplicate stitch, mending’ you’ll find all you ever wanted to know.
It’s my favorite way to reinforce thin spots and can even be used if you have some missing stitches. I firmly believe it’s the most useful technique for mending your knitting, and you should add it to your store of sneaky tricks.
Always remember to extend the patch at least a few stitches/rows on either side of the thin spot, and try and keep your tension even as you work, but otherwise there really are no tricks to this. You’re just recreating the fabric that’s wearing thin. All it takes is a bit of patience!