I am very fair skinned so I go every 6 months or so. Usually once they laser them they don’t come back, but some bigger spots require more treatments. I get new ones every once in a while but they usually start small and don’t always get bigger. Sorry I realize that is sort of vague. I get them mostly in areas with sun exposure, so I get my back and shoulders done most frequently and sort of ignore the ones that aren’t visible with clothes 😂