![photo of puva light therapy](https://img.webmd.com/dtmcms/live/webmd/consumer_assets/site_images/article_thumbnails/slideshows/benefits_of_light_therapy_slideshow/1800x1200_benefits_of_light_therapy_slideshow.jpg)
When do you need to step up from a topical treatment to one that clears skin body-wide? Learn how your dermatologist will make the decision.
When do you need to step up from a topical treatment to one that clears skin body-wide? Learn how your dermatologist will make the decision.