It is the ancient art and science of detecting the existing status of a person’s body, mind, soul and spirit.
Nadi or pulse is that vital flow of energy or life that courses through as a subtle channel all over the body, and enables the vaidya to feel the way the blood spurts from the heart.
The functioning and health of the entire mind body constitution can be determined from the pulse, including the balance of the doshas, the health of the various organs, advance warning signs of potential problems that may crop up later etc.
By detecting early symptoms of imbalance and disease reaction in the body, one can take preventive steps to correct the problem before it manifests into a major one.