DOSHA
The five elements presents itself in different combination as TRIDOSAS or functions principles or the body mechanism. They are
VATA - VAYU+AKASA
PITTA - AGNI+JALA
KAPHA - PRITHVI+JALA
The TRIDOSA are the principles present in the body always, having their own definits Pramana (Quantity) Guna (Quality) and Karma (Function). When they are normal they attend to different functions of the body and maintain it. But they have the tendancy to become undergoing increase (Vridhi or decrease ksaya) quantitatively and qualitatively. When they are abnormal, they vitiate their places of dwelling – the dhatus. Because of their tendancy of vitation, they are called Dosas or Vitiators.
Though Dosas are present all over the body. They are found predominantly in areas below the Nabhi (vata between Hrudaya and Nabhi(pitta) and above Hirudaya (Kapha))