I'm concerned about tooth discoloration.

I like coffee, so I drink about 1 to 2 cups a day.

However, at some point, my teeth started to turn yellow.

Even if you brush diligently, your tooth color does not improve.

There is a teeth whitening treatment available.

There are concerns that teeth whitening can damage the teeth, so I'm hesitant to proceed with the treatment.

I'm wondering if teeth whitening treatment is okay.