Things to consider for those that don't get better with healthy diet (low glycemic/nutrient dense/whole) and lifestyle.
Acne or acne -like breakouts caused by Flouride. http://www.cellulite.../fluoride-acne, http://www.skin-evolutions.co.uk/fluoroderma-could-flouride-be-causing-your-acne/, http://www.ncbi.nlm....v/pubmed/507887
Also, halogenoderma - caused by halogens of which flouride is one. Also iodine & bromide. Bromides are additives in many processed foods and beverages and are detrimental to your health. Just another of many reasons you want to eat real food.
Demodex mites could be another.