Is there a big difference between uneven skin tone hyperpigmention? i have acne scar for a year that don't go away can it be because of one of those?

Protect and correct: Often individuals who have uneven skin tone, may be prone to other pigmentation irregularities. Most of us can develop hyper pigmentation post-trauma. I always advise careful protection of a newly healing area, to avoid hyper pigmentation. Acne scars can indeed hyper pigment if not protected from the sun. Some may also need tretinoin and Hydroquinone.