My rear wheel has 24 spokes (700c rim, running 25 mm tires, semi-aero rims, Bontrager SSR). I noticed the other day that it was out of true by like 4 or 5 mm, easily; I think it was from when I hit a lip in a road while negotiating a turn (must have been a good 2" tall--the kind of lip left when they tear up some pavement to repave--but are not paving the side road). I quickly located the loose spoke, and it must have taken probably at least 5 turns to bring it back in. I did tweak a few other spokes--I barely know what I'm doing here--but those took like quarter turns. Now it's like a mm out of true, more than good enough for me. [I couldn't tell it was that out of true while biking.]

All the spokes are relatively the same tension now (but I don't have a tension meter, and I'm totally tone deaf), and "feel" tight.

What does this bode for the future? I'm thinking that spoke got stretched, and it will probably loosen up again on the next hard hit (or just slowly over time). But that's just the nature of the wheel, and it'll do that until I either replace the wheel or at least the spokes, right?