I picked a scab off my neck and after two years the dark mark is still there, how do i get my skin to turn back to its original color?

Hyperpigmentation: Post inflammatory hyperpigmentation is common in individuals with darker skin types. Depending on the size and location you may be able to use medications like finacea, retin a, (tretinoin) or hydroquinone to lighten the discoloration. It is also critical to protect this skin from sun exposure. Check with your dermatologist for evaluation and tx recommendations.