A good place to start is chlorine bleach.
How to remove mould from bathroom walls and ceiling.
Mix a solution of one part bleach to three parts water in a spray bottle and thoroughly saturate the moldy areas of the wall.
Open a window and or keep a fan.
You can purchase a chlorine bleach cleaner specifically meant for bathroom mold such as tilex mold mildew remover.
Removing mold on tiled walls.
Be sure to open any windows in the bathroom when you are showering even if it is just slightly.
Bathrooms and laundry rooms develop mold because they re typically very humid.
To avoid the accumulation of mold spores it is vital to circulate the air when the shower or bath is being used especially if the weather is hot and humid.
Remove mold stains from walls.
Mould growth is the result of too much moisture accumulating plus inadequate ventilation.
To remove mold from the ceiling use a step ladder or stool to reach the area.
Unsightly mould growing on bathroom ceiling wall and other surfaces is a major frustration in many australian homes.
Mold on basement or exterior walls occurs when water vapor in the air meets a cold surface and turns the vapor into a liquid.
Remember to put on gloves and a mask or respirator before touching or removing the mold.
The growth of black mould growth on bathroom ceilings and walls is a sign of condensation and in bathrooms there is generally plenty of that.
The warm air laden with moisture comes into contact with a cold surface and that cools the air so that it can no longer hold the moisture which then condenses on that surface.
Then use a paint scraper to remove the paint in the affected area.
A bathroom ceiling fan or room vent would reduce a great deal of the moisture in the room.