Water is coming out from shower hose every time I use water in any part of my house
Your shower valve is supposed to be able to be turned off completely. If you have a pressure balancing shower valve that will not turn off, then I suppose that lowering the pressure in one or the other of the hot or the cold line (which is what would happen if you open a valve elsewhere) could cause water to flow through the shower valve. Is the flow from the shower hot or cold water? Does the flow from the shower happen if you draw cold water elsewhere or hot water or either? 

The solution would be to disassemble the shower valve and see if you can find a fault and if necessary check the adjustment of the pressure balancing.

EDIT

However, since it is some trouble to disassemble these valves you should thoroughly investigate the matter before taking that step. It has been reported that some "washerless" faucets actually use the pressure to seal and so leak when the pressure gets low. If this is what is happening with this shower valve, then you don't want to disassemble it. You need to do some testing to better define the conditions under which the shower delivers water when it is "off".