Stretch Marks Affecting Your Life- Know More About Causes Stretch marks are scars that develop as a result of the overstretching of the skin and an increase in cortisone level present in the body. Excessive cortisone, one of the primary hormones the adrenal gland releases during stressful times, can make the skin lose its elasticity. Stretch marks, referred to as striae, form parallel lines on the skin. These marks range in colour from purple and red...