Why does it take so long for pimple marks on the face to disappear?

I am bothered by even a single pimple on my skin, but personally, what is more frustrating is that the marks linger for a long time even after the pimple subsides.

At first, I thought it would naturally disappear after a few days.

However, when red marks or dark spots actually remained, my skin didn't look clean, so I found myself constantly checking the mirror.

In particular, if new pimples no longer appear but old marks remain, it feels like the skin is still in poor condition.

So, to get rid of the marks quickly, people try harder with exfoliation or look for products with whitening functions.

After hearing that applying stimulation could actually make the mark last longer, it is difficult to decide what to do.

I am also wondering if the care methods for the red marks and the brown discoloration are different.

I would also like to know how important it is to consistently use UV protection to prevent the marks from darkening.

The time it takes for it to naturally fade may vary depending on your skin condition, but I'm wondering if there are any helpful care methods other than just waiting.

If you have ever worried about the marks left behind after a pimple disappeared, how did you manage them?

I would appreciate it if you could share your experiences regarding methods that you found effective or habits that were better to avoid.