I'm so curious about the cause of freckles!

Hello~ I'm curious about the cause of freckles, so I'm leaving a detailed question ㅠㅠ

Why do small pigment spots on the face and body appear concentrated in certain areas?

I also want to know if there are differences depending on skin type or age.

I heard that it is related to increased melanin pigmentation, but even if there is not much exposure to UV rays

I'm also curious as to whether this happens and why it darkens or lightens with the seasons.

In particular, I would like to know which factor plays a greater role in the cause of freckles.

Is it because of genetic influence or lack of regular sun protection habits?

I wonder if lifestyle habits like sleep and stress also have an effect ㅠㅠ

Things to be careful about in daily life for prevention and if it has already occurred

I want to know how to manage it, and from the perspective of dermatological treatment and prevention.

I need an explanation that helps me understand the causes of freckles ㅠㅠ