Pigmentation changes. be careful with peels to the neck

The skin on your neck has a very thin epidermis and dermis.  Superficial peels such as Alpha hydroxy (glycolic acid), Jessner's solution, or trichloroacetic acid (10-25%) should be used to prevent hypertrophic scarring more pigmentation changes.  Trichloroacetic acid (TCA) peels very in depth depending on concentration, skin type, how the skin was prepped, and the method of applying the solution.

The same holds true for the chest area(decollate) although this skin is a little thicker.  Ask your physician which type of peel he plans to use.