Downstairs said that my toilet was leaking, urgent

It should be that the water pipe of your house is leaking, it is recommended that you go downstairs to dismantle the roof of his house and see where the water point of his house is leaking? If it is near the sewer of the toilet or basin, then it is your basin or toilet leaking, the repair method is to remove the toilet or basin from the bar, re-waterproof around the sewer pipe, and clean up the gap of the floor tiles of your house by the way when doing waterproofing, and make the gap of the floor tiles waterproof together, which is more safe.

If it's not leaking in these two places, is it leaking as soon as the main valve of your water pipe is opened? If so, you also need to go downstairs to see the leakage, but then go home and follow the leak to find your water pipe, the water pipe is in the wall, only to destroy the wall to find the leakage, there is no other way,

Turn off all the places where you use water to see if the water meter is still going If you still go, it is where there is a leak If your house is not leaking, turn off the valve of your house and see if it is still leaking If it is still leaking, it has nothing to do with your home pipeline It is the problem of the property company There is also the water in your basin and toilet bowl Throw a blue water purification color block and then flush If the dripping water downstairs is also blue, then it is the problem of your water If there is no color It could be flowing down the cracks in the floor slab from somewhere else, and it might not be your house, or it could be someone else's house, so you have to identify it step by step.