Most common way you can find yourself with crack or a hole in room ceiling is if someone was not particularly careful while walking in attic and stepped off the joist and on to the sheet rock. Or other common drywall damage happens when home plumbing starts to leak and water works its way in to the gypsum board.
If you found suspicious spot on your ceiling or the paint is bubbling in one or several spots, these could be indicators that there may be a water leak above the ceiling. The most common factor why ceiling drywall gets damaged is water damage either form leaky shower or toilet drain. Also old roofing and unsealed flashing might direct rain water onto the ceiling. Most of the time you will not know if ceiling drywall is absorbing moisture until damage becomes visible.
Wet and weak drywall may crack or even cave in if there is much weight above it like damp insulation or cans of recessed lighting.
Repairing damaged drywall in the ceiling may look a big job and it may be, but our professionals will replace a small patch or the whole sheet of sheetrock and make it seamless.