I have hyperpigmentation on my neck that has a stark contrast from the color of my skin where my hairline starts. I'm bald and shave my head, so I can't hide the skin under my hair. The contrast, blotchy color and the deep creases in my neck really bother me. I would love this skin to be smoother in color and texture. I've tried Halo, but am not seeing a major difference in the texture or color of the back of my neck. Would love recommendations for treatment and upkeep. Thank you!