The Ayurvedic concept of evolution of disease, based primarily in the understanding of the host-man, meaning of disease without losing sight of either the extrinsic or the intrinsic factors is comprehensive by itself.  Object of Ayurveda is to relieve mankind from diseases and death and to ensure long life - full of health and youthful vigor.  The Ayurveda refers that the Samprapti (Aetiopathogenesis) of any disease is based on the imbalance of three Dosha (Bodily humors) – Vata, Pitta and Kapha.