Does red light cause or worsen pigmentation in fair/sensitive skin?

I've just started using red light therapy and after the 4th treatment noticed hyperpigmentation on my face & new brown freckles. Is this old hyperpigmentaion resurfacing or new caused by the red light? I haven't had visible pigmentation for years due to sunscreen, peels & keeping out of the sun. I have sensitive/fair skin which reddens easily. I'm confused about the red light/angel light as it claims to be good for pigmentation. Is it normal for it to worsen before clearing? Should I continue?

No doctor answers yet