I'm worried about underarm pigmentation in the summer ㅠㅠ Will it get better if I get body toning?

Since the weather is so hot and I've been wearing sleeveless or short-sleeved tops frequently, the body pigmentation I used to ignore is really bothering me. It's especially stressful because the skin under my armpits has turned dark and discolored, probably because I've been doing self-hair removal with tweezers or razors since I was young.

I'm going on a staycation with my friends next month and need to take lots of photos in a pretty swimsuit, but I feel embarrassed to raise my hand, so I'm urgently looking to get help from a dermatologist!

Is it possible to perform pigment toning treatments on body areas like the underarms or elbows at Maypure, in addition to the face? If so, I would like to know how many sessions are typically required to see a noticeable improvement in skin tone. I would also appreciate it if you could let me know if combining laser hair removal with toning would cause any irritation!