Q: I’m pregnant and worried about getting stretch marks! Is there anything I can do to prevent them for these 10 lunar months? Laura G. Portland, Oregon A: Stretch marks, also known as striae, appear as raised, red lines on the skin. These striae are caused by the loss of elasticity in the dermis (collagen and elastin), the underlying skin layer. These non-forgiving marks will start as red, raised marks, yet eventually will fade to a white or silver. They usually occur on your buttocks, thighs,...