Will the dark spots around my cheekbones go down if I get Clarity blemish treatment? ㅠㅠ

Even though I apply sunscreen quite meticulously when I go out, the UV rays must be so strong that faint freckles and blemishes have suddenly flared up dark under my eyes and around my cheekbones. My complexion looks so dull, and even when I try to cover them up thickly with concealer, they still look patchy. It drives me crazy how messy I look every time I look in the mirror. I heard that the Clarity laser treatment is the surefire way to get rid of pigmentation and brighten the skin tone, so I'm thinking of taking this opportunity to visit a dermatologist! But is it really not effective after just one or two sessions? I'm wondering roughly how many sessions I usually need to get consistently to see definite whitening and results. I'm scared of the pain, so please share some tips if you know if it gets hot or painful when the laser is applied, or if severe scabs form.