Are there any people here who have experience treating blemishes?

Hello. Lately, I’ve been so upset every time I do my makeup because of the dark spots that have suddenly appeared on my face. ㅠㅠ In the past, concealer could cover them to some extent, but now it doesn't even hide them, and it feels like my makeup just gets thicker. I’ve been diligently applying sunscreen, but I wonder if it’s inevitable that blemishes appear as I get older... I just sigh heavily every time I look in the mirror. I feel like I can't go on like this, so I’m looking into treatments for these blemishes. I don't know why there are so many types, like toning and Piconi. My skin is a bit sensitive, so I’m suddenly terrified that if I get the wrong treatment, my hyperpigmentation might get worse or my skin might break out. I’m also worried about spending a lot of money without seeing any results. Has anyone else received treatment for blemishes or melasma like me? Please share which procedures worked well for you, or if you have any tips on how to care for your skin afterward to avoid side effects. I hope you all get beautiful skin!