The face should be clean and are of makeup for the treatment. We have natural wipes (with no chemicals in them) in the office if you need to wipe off the makeup when you arrive. you can have lotion on your skin- that will not affect the treatment.
If you are using any retinol cream on your face please refrain from using it for 4-5 days before the treatment. Retinols will make your skin sun sensitive (and of course laser sensitive). You can continue with the cream immediately after the treatment.
After the treatment is complete you can apply lotions and makeup right after the treatment.