Hi,
Aside from monitoring the moles with map and photographs, it would also be good to know the ABCDE rule. A for asymmetry, B for border, C for color , D for diameter and E for elevation. Normal moles or freckles are completely symmetrical and the border should be smooth and not blurry. A mole that is more than one hue is suspicious and needs to be evaluated by a doctor. If it is larger than a pencil eraser (about 1/4 inch), and is raised above the surface and has an uneven surface, this should also be evaluated by your doctor.
Take care and regards.
As far as I know this is true. I have been told that the moles to be more concerned about are those that appear later not the ones you have had since you were a child.
Also I believe you should have skin checks every year but with a lot of moles I think you should check your skin every month at least and monitor changes. I do this frequently. You know your body better than anyone else so it makes sense to monitor your moles and keep track of them as any problems are best caught early.
I dont think you need to be concerned about having the moles but if you havent seen a dermatologist maybe see one soon and have them do a full check. They may monitor your moles using a mole map or photos of unusual ones so they can track changes.
Goodluck.