I'm curious about teeth whitening.

After drinking coffee, I feel like I want to rinse my mouth.

Maybe it's because I drink coffee often or something.

It seems like my teeth are turning yellow.

The two front teeth are a darker shade than the other teethㅠㅠ

Does teeth whitening cause damage to the teeth?

How many times do I have to do it?;;

How much does teeth whitening typically cost?

I'm wondering if there are any side effects.