To fix this, start by turning off the water supply to the faucet. You can do this by using the shut-off valves under the sink, or if there are no separate valves, use the main water supply. Turn on the faucet to let out any water that is left, so it doesn’t make a mess.
To access the handle of the faucet, you will need to unscrew a decorative cap or pry off a cover, depending on the type of faucet. Inside, you will find the cartridge, valve, or seat and spring, which are often the cause of the leak. Thoroughly examine these parts for any signs of damage, corrosion, or wearing out.
If any parts are broken, you can find replacements at a hardware store nearby. Put the faucet back together, making sure it is in the correct position. Please re-activate the water supply and slowly turn the faucet on to see if there are any leaks. If the leak is fixed, it means your faucet has been successfully repaired. If you continue to have problems, you should contact a professional plumber in Mississauga.