This is my first time getting Pico Toning. May I ask a few questions?

I started noticing pigmentation rising on my cheekbones and under my eyes a while ago, so I looked into Pico Toning.

I understand that Pico Toning helps break down pigmentation, but I have a separate question.

I am most curious about whether I can feel the effects after just one Pico Toning session, or if I need to complete a certain number of sessions to see changes.

I have heard that pigmentation can temporarily increase after Pico Toning, so I would like to ask if that is a normal reaction.

Also, I'm not sure if I can wear sunscreen or if I need to go with a bare face on the day of my Pico Toning appointment.

I apologize for asking about such a trivial matter, but please answer.