It is common for loose pieces of drywall to stick up from a hole or dent in drywall. Use a fine-grit sanding sponge between 150 and 220 grit or a putty knife to smooth the area where the repair ...

Secure the drywall patch in place using drywall screws and a drill. If no wall studs are available, use back bracing, drywall repair clips, or adhesive mesh tape for support.

These new screws will hold the drywall to the stud more securely, preventing future pops. Then, reset the popped nail or screw using the advice above, and finally, repair the surface of the wall ...