The most common faucet problems are drips from the spout, leaks at the base or handle, weak water flow, stiff or loose handles, and water that will not shut off. Most come from worn washers, O-rings, seats or cartridges, or from mineral buildup inside the faucet.
A small drip can feel like a minor problem, but it does not fix itself. Water that keeps leaking can wear out parts faster, stain the sink, soften the cabinet under it and raise your water bill. Fixing a drip early is usually simpler than waiting for a bigger leak.