PIH (post-inflamatory-hyperpigmentation) is a result of melanocytes (pigment cells) getting over-stimulated by the natural inflammation process. Important to understand is that with ALL healing, this inflammatory process is going to last a long time (even if you don’t see it).
Melanocytes (being stimulated) don’t just product “one set” of pigment bundles, they keep on producing “melanin” for months and months as long as the skin is “actively healing.” (That’s why fade creams only work when you use them. Stop using the creams, and the PIH returns.)
Now to answer your question? Basically, don’t worry about any long-term effects; you will be just fine. Don’t get “burned” by the sun (or try to get a tan) just yet. Give this time to normalize. However, eventually your skin will be fully normal and you will see no difference in the way your skin responds to the sun.
The skin is WAY more dynamic than any of us understand … so is the entire body. For example, guess how many cells in the body “replicate” in ONE second!
If you guessed 10 million per second, you would be correct!