A mushroom is actually a fungus that grows.
Mushrooms growing out my bathroom wall.
Fungi and molds grow because of high humidity.
A majority of mushrooms are harmless though you should not eat any mushrooms that grow in your bathroom as a matter of caution.
First remove any mushrooms with gloves or a paper towel.
Mold and mildew flourish in the same conditions that support mushroom growth and exposure to them poses a risk of serious allergic reactions or respiratory illnesses.
If it s not water from the toilet could be running on or under the floor and creating a water source for mushrooms to grow.
Re apply and scrub with a brush or scouring sponge.
Your towel needs to dry as quickly as possible after use.
Make a solution of fungus cleaner by mixing one part bleach to three parts warm water in a bucket or spray bottle.
How to prevent mushroom growing in a bathroom consider humidity levels.
My guess is that you have a moisture problem behind the wall where the mushrooms are sprouting.
I have seen mushrooms growing near the base of a toilet on an overhead garage door s wooden panels on fence posts living trees and in crawlspaces.
Apply the bleach solution to the affected area and leave to dry.
If it s high then.
To keep mushrooms from popping back up you should keep your bathroom dry install dehumidifier in there or a fan and dont get out of the shower while you are sopping wet.
The first thing to consider is the level of humidity your bathroom has.
Keep your towels dry.
Your first step should be to remove the mushrooms and any other fungi white and green stuff.
The real danger of bathroom mushrooms is that they are a sign of a significant moisture problem that could support the more harmful growth of black mold or mildew.
For instance if the mushrooms are growing in the bathroom check your toilet to make sure it is well attached and sealed to the floor.
If that is the case the only way to permanently fix the problem is to tear the wall apart remove.
Seek out the source of moisture in the room that allows the mushrooms to grow.