Description of the etiological factors as 'Trividha-Het ' is unique classification in yurveda. Amongst these three factors K la (time-factor) is beyond the reach of human. It is unavoidable. It is the root cause of climatic changes which we called as seasons i.e. ' TU'. Such climatic changes are responsible for development of various signs & symptoms which are known as 'symptoms due to season change'. To avoid these seasonal illness & maintain health throughout the year, seasonal regimen i.e. tucary is described in yurveda. Some signs and symptoms or diseases are likely to occur during the...