Shortly after purchasing a new home, I found water puddling in my backyard. I traced it back to the base of my exterior wall. On the other side of the wall is my pantry, but above that is my master bathroom. The inside of my pantry has water stain path running vertically. It appears to have been exposed to water for quite some time. I know the water must be coming from directly upstairs, but I do not know how to find where the leak is coming from without ripping apart the entire bathroom. Directly above the water stains is my bathtub and my shower is adjacent to that so I can not figure out if it is coming from my shower or my bathtub or both. I have no idea how to fix this problem when I do not know what exactly the problem is or how to find where the water is coming from. Please, if you have ANY suggestions or ideas they would be greatly appreciated.