You’ve probably had some. White lines or spots that appear and grow out with your nails. Why does this happen? There are a few reasons, ranging from bumping your nail to poisoning. Check out his Quick Question to see what might apply to you!
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Sources:
http://www.ccjm.org/topics/dermatology/single-article-page/evaluation-of-nail-lines-color-and-shape-hold-clues/a5697acf28f315d0d86027095b728ca0.html
http://www.everydayhealth.com/skin-and-beauty/beauty/what-your-nails-say-about-you.aspx
https://medlineplus.gov/ency/article/003247.htm
http://www.aafp.org/afp/2004/0315/p1417.html
http://www.jtad.org/2009/1/jtad93101r.pdf
http://www.mayoclinic.org/healthy-lifestyle/adult-health/in-depth/nails/art-20044954
https://www.aad.org/media/stats/prevention-and-care/nail-care
https://www.aad.org/media/news-releases/pinning-down-the-cause-of-nail-problems-is-the-first-step-to-prevention-finding-solution
http://newsnetwork.mayoclinic.org/discussion/fingernails-are-a-window-to-your-health/
https://books.google.com/books?id=ekr4Bt683c8C&pg=PT417
http://www.dermnetnz.org/topics/chronic-arsenic-poisoning
https://books.google.com/books?id=PZZZI8YpTxoC&pg=PA152
Images:
Mee’s Lines: https://commons.wikimedia.org/wiki/File:Mee%27s_lines.JPG
Toe Fungus: https://commons.wikimedia.org/wiki/File:Toefungus.jpg
Nail Anatomy Diagram: https://commons.wikimedia.org/wiki/File:Human_nail_anatomy.jpg
Nail Matrix: https://commons.wikimedia.org/wiki/File:Blausen_0406_FingerNailAnatomy.png
