Nail pops everywhere; why am I seeing them? How do I repair them? Very good question. I have answers for this problem. Drywall nails were used from 1950’s to 1980’s and screws came about 1985. Sheetrock hangers would hit the nail to recess it so it would hold the joint-compound and that would crumble the drywall and create air pocket that causes it to bubble out between the paper. To repair it properly screw above and below the nail pop. This will pull the drywall back tight to the stud. Then take a utility knife cut the blister/nail pop out allowing the air to escape. Apply three coats of joint compound and then you can sand and paint.