See What Your Manicurist Sees When Looking at Your Fingernails!
The manicurist might not recognize the symptoms your fingernails portray. However, some practitioners of Eastern and Western Medicine or of Holistic Healing Modalities can identify health problems by looking at your fingernails before you cover them up with nail polish. 
Here are some resources before we continue. They help define our terms of Eastern, Western, and Complementary and Alternative Medicine (CAM / holistic healing). They also provide more pictures and links than I can include in this blog.
The National Institute of Health (NIH) compares Eastern and Western approaches to medicine and health.
An easier way to understand it may be found in the blog of a person who has practiced “all of the above.” Dr. Emili Kim describes his findings.
I
am neither a physician nor a practitioner of Eastern Medicine. However, I am certified in a number of holistic healing (CAM) methods. I can share what they know and what I know as you stare at your fingernails.
East Meets West with Holistic Healing in the Center
Ayurveda, Chinese medicine, alternative medicine, and now Western medicine often agree on the value of “reading” fingernails (and toenails), eyes, ears, and tongues in the diagnostic process.
Why did the doctors, medical staff, and their assistants start calling me,“The Tongue Lady,” when I had to undergo major abdominal surgery? What do tongues have to do with tummies? Sounds gross! It wasn’t.
They saw me reading my favorite, short, book about 
No, I was not paid to extol the virtues of his book. I share about it because I learned a lot from Lad’s work. The medical staff became totally intrigued by the sketches of tongues in that book. Soon, they were sticking out their own tongues while looking in a mirror to diagnose themselves. Given human nature, they immediately began diagnosing each other and everyone they know – present or absent from the scene.
Ayurveda, Chinese medicine, and now Western medicine have come to the same conclusions about the value of “reading” fingernails, eyes, and tongues in the diagnostic process. (That’s why the doctor has you stick out your tongue and say “Aaa-aaaa-ah.” Below are some examples of disease conditions related to the visible state of your fingernails. I’ve included links for Dr. Lad, The Guild of Naturopathic Iridologists International, Natural Health Techniques, and WEBMD.