I have a lot of freckles, clusters of melaninized cells.
oh yea? is it a genetic thing? how are they formed ?
Sometimes they're genetic but they're usually triggered by exposure to sunlight.
do you ever lose them or do they stay forever ?
In some cases they fade with age but you can also use lasers or creams to fade them.
how big do they get ? do they hurt ?
It's possible for them to multiply and cover an entire area of skin. And they're painless but I'm sure lasering them off would be painful.