(Concern) I have developed too many moles on my body.

I used to have almost no moles, but suddenly I have developed many.

Is this just a natural phenomenon caused by aging?

However, it's not just a tiny dot that might be noticeable, but a slightly raised black spot that looks like a wart. I heard that it might not be just a mole but could also be skin cancer, so I'm worried.

I'm wondering whether this is something an individual can do to prevent, or if I should not ignore the spots and instead go to a dermatologist for diagnosis or removal.

Currently, they are mostly appearing on my arms, so I'm relieved it's not on my face, but if I look closely, they seem to be getting bigger over time, and I'm worried about various things.