A dripping faucet is usually caused by worn-out or damaged components such as washers, O-rings, or seals. These parts can degrade over time, leading to leaks. To fix a dripping faucet, first turn off the water supply. Disassemble the faucet and inspect the internal parts, replacing any worn or damaged components. Reassemble the faucet and turn the water supply back on to check for leaks. If the issue persists, consider consulting a professional plumber for further assistance.