What are the black spots on your face?

How many times should I apply sunscreen?

I'm worried about it later after applying it.

I posted a message saying it would be possible, but I haven't received any response.

If I develop black spots on my face regardless of age, what kind of treatment should I receive at the dermatology clinic?

I just want to know the treatment name so I can look it up myself, do some research, and also check the price range before I go.