If you find any leak, so should be follow these some things like-
Turn off the main water valve.
Dry the surface by draining the water to avoid any sort of mishap. As a bathroom floor becomes slippery after such leakages which can lead to some serious accidents.
You should try to collect as much water as you can in buckets or containers.
You should work carefully with hot water lines to avoid any type of injuries.
If you find a hole in your pipe, wrap it up with a piece of rubber.
For temporary fixation you can use adhesives like quick fixes.
For permanent solution of leakage problem, you need to use certain hardware equipments, like hose clamps, electrical tape, plumber epoxy putty.