Clean the area thoroughly using a mildew killing cleaner and allow the area to dry.
Paint on ceiling in bathroom is peeling.
To stop future peeling and damage to the wall or ceiling surface reseal the area using paint and primer.
The water can originate from a leaking roof gutter flashing or soffit.
Gear up with goggles and a face mask because tiny flakes of paint are sure to go flying.
To avoid the same problem in the future use an oil based primer with.
Then using a putty knife wire brush or paint scraper carefully remove all the chipped or peeling paint.
Peeling paint is a common problem in bathrooms due to the high humidity and moisture found there.
Water is the primary cause of flaking paint on bathroom walls and ceilings as well as on exterior walls.
Your bathroom walls and ceiling probably started peeling in the first place because they weren t properly primed.