Tri means three and Doshas being the basic physical energies when in balance. Tridoshas are the biological deriVataives of the five basic elements present in the Universe. Literally means fault. The term Doshas means the factors which are capable of vitiating the body tissues if they are  increased, decreased or vitiated alone or all together. These three are the basic constituents responsible for the structure and proper functioning of the body or its existence as a whole.

At the time of conception, permutations and combinations of Vata, Pitta and Kapha determine the constitution of the new individual.