Skin pigmentation concerns

Lately, I've been noticing an increase in dark spots on my face and body, and I'm considering consulting a dermatologist. I'm especially stressed out every time I look in the mirror because of the pigmentation I've developed after acne or sun exposure. Makeup doesn't completely cover them, which lowers my confidence. I thought they would fade naturally over time, but they seem to be getting darker. I've searched the internet and found that treatment methods for skin pigmentation vary depending on the cause, making it difficult to determine the cause on my own. I'm wondering if laser treatment or whitening creams would help, or if lifestyle changes would be the first step. I want to get a proper diagnosis of my skin pigmentation and develop a treatment plan tailored to my skin type!

Has anyone tried any treatment for skin pigmentation?