Does sunblock reduce the effectiveness of Lightsheer diode laser?
Doctor Answers 3
Does sunblock effect results for LHR
I would express these concerns to your physician or laser technician at your next visit. It's very unlikely that wearing SPF during a treatment will compromise the the effectiveness of your treatment.
Sunblock and Laser hair treatment
While it is unlikely that this caused any issues, I would recommend washing off any products prior to laser treatments going forward.