Life by Design

7 Things Your Hair Says About Your Health Your hair can let you and your doctor know whether you're stressed, have a nutritional deficiency, a thyroid problem, or other health issues. Here are seven key things to look for in your locks. By Madeline R. Vann, MPH Medically Reviewed by Ross Radusky, MD You probably think about your hair on a daily basis — fretting over a bad hair day or enjoying a nice blowout, or maybe wondering whether to try out the new style you noticed on your favorite celebrity. But you might be missing clues that your  hair  is revealing about your health. Research shows that changes in your hair's look, texture, or thickness can be signs of underlying health conditions. Here's how you can tell whether your hair changes are due to a health problem, genetics,  stress , or a nutritional deficiency.  1 Stress (and Genes) Can Make You Go Gray Anyone who has watched presidential hair change from campaign to campaign has noticed tha...