I see this all the time. Shower curtains and shower habits are tough on drywall. The best thing to do would be install a shower door and track that keeps the water in. Understanding that this may not be an option here are a couple other things .
1- make sure the curtain is inside the tub when shower is on.
2-point the shower head toward the other side of the wall when using shower to help spray from splashing outside curtain.
3-they make suction cups that attach to shower curtains that you can keep the curtain tight to the walls to help spray from splashing outside the curtain.
4- You can silicone a plastic strip along the tub wall to help keep water from running outside the tub...
5- make sure it isn't water from your shower valves that is leaking from the wall and running down to the drywall.
6- Purchase a Shower Leak Prevention product like the NoMorWetFloor at www.nomorwetfloor.com
Tuck it into your bathtub.
Is the expansion tank in your system leaking and causing problems?
Is the washer valve in your appliance leaking and causing water damage?
Is your shower drain leaking and causing water damage in your bathroom?
Is the toilet leaking on the floor and causing damage or problems in your bathroom?
Is the water line in your refrigerator leaking and causing damage in your kitchen?
Is your toilet's water tank leaking and causing damage in your bathroom?
A shower liner helps to protect your shower curtain from getting wet and moldy, making it last longer. It also helps to prevent water from leaking out of the shower and causing damage to your bathroom floor.
Yes, the bathroom leaking through the ceiling is causing damage to the property.
Is the tub's overflow drain leaking and causing water damage in your bathroom?
Yes, the valve is leaking water and causing damage to the surrounding area.
Yes, the leaking washer pipe may be causing damage to the surrounding area.