There are many things that we cannot do on our own, and is best left to professionals. You might think that a leaking shower is easy to repair, but the reality is that it can be a very complex task. Sometimes it may require that the whole tiled wall have to be broken down, but this depends on the source of the leak. This is a difficult task and should not be attempted by anyone who in not a professional plumber.
If there is water running out of a connection between your shower head and the wall, then it might just need a replacement for the shower head. Just remove the shower head and put a new one. The larger shower leak issues is when the handles leak or when there is moisture from behind the wall at the valve.
You should call a plumber at once if there is moisture from behind the wall. If there are no damaged on the tiled wall and the pipes and valves can be reached on the other side of the wall, the leak can be repaired from the backside. The problem can easily be located by the professional plumber so as to minimize the damage.
If because of the moisture on the wall from behind, the tiles have come loose, then the whole wall need to be broken down and repaired. If the studs are wet, then they have to be completely dried before processing. This will definitely require new tiles.
After the leak has been located, the plumber determines whether to replace the valve or the pipe itself, but if there things are to be removed then it can be hindered by the age of the valve and the amount of time that it has been leaking. Another things that will cause difficulty in loosening the valve is the presence of rust and debris and this makes them adhere together fast. However professional can easily get these pipes loosed.
Water is getting through the wall under your bathtub and running out if you notice water at the base of your tub or shower. This can possibly be due to the fact that there is a crack around the drain of at the bottom of the tub or shower. It is not easy to replace a shower pan. In this case the tub or shower bottom needs to be removed which requires breaking out additional tiles.
Most often, what makes a plumbing leak difficult has nothing to do with the repair. It is easy to repair a plumbing leak. Difficulty happens exposing the original leaking area and removing the materials for repair. It is very easy to damage more property than necessary during discovery and removal. Then more parts and labor are involved replacing the original parts.