Nail pops are tiny, and mostly they mean tiny things.

Drywall Nail Pops: diagnosed and explained.

A nail pop is a small circular bump or crater in the drywall where a fastener has pushed the surface out or broken through the paint. It happens because the drywall and the fastener moved relative to each other, and the honest news is that the usual cause is mundane: framing lumber holds moisture when a house is built, and as the studs dry and shrink over the first few years, they let go of nails by fractions of an inch, telegraphing little bumps through the finish. Seasonal humidity swings do the same on a smaller scale for the life of the house. That version is cosmetic, and the fix is a screw, a dab of compound, and paint. The version worth noticing is different in pattern. When a foundation settles unevenly, the wall framing racks, and flexing walls work their fasteners the same way bending a paperclip works its metal. Nail pops from structural flexing arrive in clusters or rows along a wall or ceiling, keep appearing after you repair them, and travel with the rest of the settlement family: diagonal cracks off door corners, sticking doors, floors leaning toward the same zone. In Southern California, Arizona, and Nevada, homes flex most where expansive clay swells and shrinks beneath them season after season. On their own, nail pops sit at the bottom of the worry list. As the visible edge of a moving frame, they are worth counting, not merely patching.

For the repair side of this, the foundation repair solutions page lists every method Dalinghaus installs, including the ones that fix problems other than drywall nail pops.