How to Repair Paint Bubbles on Walls
Moisture and heat cause bubbles and blisters on a newly painted wall. If the blemish appeared after the paint dried, it's probably due to moisture in the wall or, more commonly, patch material that hadn't dried completely. If the blemish appeared while the paint was still wet, it's probably due to excessive heat. Before fixing the paint, address the initial problem. Allow patches to dry for several hours or overnight before painting over them and avoid painting on very hot days if possible. Run an air conditioner or fan to lower the temperature if you're painting on a hot day.