How do I manage pigmentation around my mouth or other areas?

Lately, my skin tone has become dull overall, and the area around my mouth looks particularly dark, which is a concern. My elbows and knees have also become darker, and I'm self-conscious about them every time I get dressed. When I try to cover them up with makeup, they just look thicker and more suffocating. It makes me feel like I haven't washed my face, so even with makeup on, I look messy, which is a concern.

I've been using a pigmentation-specific cream for several months, but I'm not sure if it's working, and even with consistent use, I still don't feel confident. If anyone has experienced pigmentation around their lips or other areas and has managed it, it would be incredibly helpful if you could share your experience.