What should I do if the sink smells big in the room?

The sink is in the room, the smell is big, and the solution is:

First, check if there are bends in the sewer pipe, and if not, modify the following to isolate the odor.

Second, when not in use, the leak should be plugged to prevent the smell from returning.

Third, open windows frequently for ventilation and install a ventilation fan indoors.

Hope it helps.

If the washstand smells big in the room, first, you can buy an aromatherapy and put it on the washstand, so that you can cover up the bad smell, and second, you can install a ventilation fan in the room, which is a more practical solution.

You can put some lemon, vinegar and these things to deodorize and sterilize,

Clean frequently and spray some air fresheners.