I answered this question already. IT's called PIE or PIH depending on the age. Wounding after scarring is normal, hyperpigmetnation is also normal in darker skin types. I already gave you the lasers that work for this and the creams to try first. It can take a year to years to heal naturally.

Please click the faq, it's the very top post of this sub. Goto skin section and PIE and PIH