I'm curious about the cause of freckles!

After reading reviews of Maypure's meticulous treatment, I'm considering freckle treatment. I've had a few freckles around my cheekbones since I was young, but they've recently become darker and wider.

I searched on portal sites and found that genetic factors and UV rays are the main causes of freckles. I diligently apply sunscreen, but I'd still like to know the root cause of these freckles.

I'm wondering if this is just a temporary phenomenon or if there's another cause for my freckles that I can't avoid due to my skin type.
I would like to get clear skin through laser treatment this time, but before the treatment, I would like to understand the causes of freckles and deal with them.

thank you!