The mystery of the human body is vast and profound. Traditional Chinese medicine (TCM) believes that as finger and toenails are connected to the viscera through the meridians, monitoring their condition can help to interpret health signals of the body, and provide an early response to and relief of physical illnesses. 
Jonathan Liu, a TCM practitioner and a professor of traditional Chinese medicine at Georgian College, Canada, explained the secrets behind nail observation in the “Health 1+1” program.
In TCM, it’s believed that nails are the extension of sinews, and are the part of the sinews that extend furthest to the outside. Sinews in Chinese medicine include fascia, ligaments, muscles, and tendons and are governed by the liver. …