Are there no side effects to teeth whitening?

Maybe it's because I like drinking coffee

I think my teeth are a bit stained, so I am considering teeth whitening.

After all, having bright teeth makes you look better.

I'm wondering if there are any side effects to teeth whitening.

I heard that there are symptoms of tooth sensitivity in the past.

I'm curious if that's still the case these days, or if there are any other side effects.