Photodynamic TherapyPhototherapy Compare To Other Treatments OverviewHow to UseSide EffectsHow It WorksPregnancy & BreastfeedingPhotodynamic therapy works through the following mechanism:Anti-sebaceous activityPhotodynamic therapy decreases skin oil. Relevant Article(s):Photodynamic Therapy - PDTLight Therapy - Blue and/or Red LightAlternative Therapies for Acne Relevant Forum(s):Other acne treatments