Could you please tell me how to manage acne pigmentation marks?

Lately, I've been careful about looking in the bathroom mirror every morning. In the past, my skin would clear up quickly after a few days of sleep, but now it's not as fast as it used to. Especially, the remaining acne on my face is getting worse. Acne pigmentation I'm stressed out every time I see the marks. Even if I carefully cover them with concealer, they quickly darken over time. In the past, the occasional breakouts themselves were a problem, but now they just linger and won't go away. Acne pigmentation It has become a bigger problem for me. Every time I see my bare face after washing my face, I regret not starting skin care sooner. I have tried vitamin ampoules and have been consistently applying whitening functional products, but the skin has already become deeply entrenched. Acne pigmentation It's not easy to solve. Lately, I've been feeling like it's time to reexamine my lifestyle habits. Has anyone found effective ways to manage these marks? I'm curious to know what products or methods you all recommend.