The blue light kills the P. acnes bacteria that cause breakouts, and the red light reduces inflammation that causes inflamed pimples. Red light also has anti-aging properties that boost collagen production in the skin. We can use blue and red LED light in combination with prescription medications or as a stand-alone treatment, an option selected by many of our pregnant patients with acne due to the therapy’s safety during pregnancy. The number of treatments varies depending on the patient and acne severity