Finishing off Acne: Acne is one of those tough problems. You find something that works and then 6 months or year later it comes back. Sometimes teenagers will 'grow out' of it, but some people are plagued until middle age or older. There is no sure way to get rid of it once and for all. There is a lot of research going on in the area of pdt (photo-dynamic therapy) for long term improvement, the future will tell.
Answered 4/3/2013
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