Hyperpigmentation does well with skin care and lasers, hairs can be improved with laser hair removal. Best, Dr. Emer.
I would control your ingrown hairs either medically or with a laser. The dark spots can be treated with a variety of creams, peels and lasers. The video link below shows how to remove brown marks ( first 2 minutes of video). All the bestDr Davin Lim Laser dermatologistBrisbane, Australia.
I would begin with light chemical peels and a combination of both Melarase PM and Melarase AM to help lighten the pigmentation.
Best, Dr. KaramanoukianLos Angeles