Do blemishes tend to recur easily after treatment? ㅠㅠㅠ

My biggest concern when considering a treatment for blemishes is recurrence. I would feel so disappointed if I spent money and went through the trouble of getting the procedure done only for the blemishes to come back soon after.

I've heard that for melasma and blemishes, the goal is to lighten them rather than completely eliminate them, so I'm curious if they often reappear over time. I'm worried I might end up having to keep getting blemish treatments repeatedly for no reason lol.

I am also curious about how important proper care is, as I have heard that it can recur due to UV rays or lifestyle habits. I would also like to know if simply applying sunscreen properly can help prevent recurrence to some extent.

I want to maintain this for as long as possible, but I want to know how realistically achievable that is. I want to know in advance because I'm afraid I might get my hopes up too high and be disappointed.

For those of you who have received blemish treatments, please let me know if you have experienced any recurrence!! I would also appreciate it if you could share the duration of the results and how to care for them.