If you want smoother, glowing skin, don't just slap on more makeup. Heal your skin from within. With so many skin treatments promising to smooth, tighten, and brighten, it's easy to feel overwhelmed by all the options, so we're simplifying it all for you. What is available, what they actually do, and who they are best for. Master aesthetician Lisa Richards shared five popular treatments she said we all need to know about.