Turn Off Water
One of the first things that you need to do when you are looking to repair a leak involving es turning off the water supply. This means that you need to make sure that the water supply to that faucet is turned off before you can begin repairs. You can turn off the water supply by turning the handle that you will be able to find under the sink. Once you have the water supply turned off, you can then safely begin repairs.
Cap Removal
You then need to take off the caps from the handle that is leaking.in most cases, it will be possible to get the caps off using just your hands and turning them. However, it might also require you to pry them off using a to if the caps are stuck. Using a flat head screwdriver is often the best tool for the job when you want to pry off the cap to a leaky faucet handle. Once you have the handle off, you can then unscrew the entire handle assembly. This is what needs to be done if you want to repair the leak.
Packing Nut
The main culprit of your leak is often a loose packing nut within the handle assembly. This means that once you remove the handle assembly, you should check it for tightness. Tightening the nit can sometimes be enough to correct the leak entirely. Just make sure that you are careful to tighten it all the way before you reattach the entire handle assembly.
Just make sure that once you are done correcting the issue that is causing the leak, that you reattach the entire handle unit correctly to ensure that it functions properly.