I have lots of moles and freckles dotted all over the place - some big, some small, some dark, some light, some flat, some raised, some a bit like skin tags. New ones appear from time to time - you seem to get more as you get older. My Father is similar.
I've never had any problems with any of mine but feel a bit concerned occasionally and so every so often when I am seeing the GP about something else I ask her/him to have a look over them to put my mind at rest.
It is important to seek help if moles/freckles change shape and/or colour, grow or bleed.