This is a common household problem and may not require a visit.
Tools Required: Adjustable Wrench or Pliers, Allen wrench
Procedure:
Step 1:
Remove handle on leaky faucet. Most handles have a small allen screw that needs removing or at least loosening in order to remove the handle. Once the handle is removed, you can proceed to next step.
Step 2:
Tighten the nut which adjusts flow of water from spigot.
Step 3:
If water stops dripping then re-attach handle and tighten allen screw. Your Done!