You need to be a detective, if you mean one the first floor of a two story house with a basement; your middle or main floor could have the pipes running through an outside wall. If this is the case there will probably be a valve in the basement that leads to this sink, use that valve to turn off that supply until the problem is fixed. Doing this will allow you to have water to the rest of the house.
Nothing, it can not do that .
The rubber stop washer has failed.
A Pegasus faucet may be a good place to put in bathroom or kitchen sinks. This faucet is a great home decoration cause it has such an elegant look to it.
Someone may have shut off the water to that faucet, or a pipe may have froze, or there may be air in the pipe.
A loose bolt or screw is the most common cause for a leaky faucet
The faucet is clogged
Rabitts freeze cause there skinny Rabitts freeze cause there skinny
Mine is fine! Yours is where the problem is. There is too little information here to answer the question. Troubleshooting would be to start at the faucet and work backwards until the cause is found. Are we talking water that starts and stops or hot water that runs out and becomes cold?
A clogged aerator on the end of the faucet would cause the water flow to decrease in that faucet.
It means that you should sell your home and move far away! No jk If its your faucet that is dripping I think in time your faucet needs repaired or replaced because if it drips only when you run water at another fixture (faucet) and doesn't drip if you have everything off then you have a strange faucet but its most likely caused by water hammer (sudden stop of water flow) and if you don't think its cause by that then it also could be from water pressure which when you turn on another faucet and the pressure drops a little and from the drop of pressure and it vibrates your seal in your faucet which could make it drip but very rare but possible.
excessive velocity
A clogged pipe can cause the water to flutter out of one faucet in the house only on the hot side. A broken valve can also cause this.