The last seven days of preceding [[ritu]] and first seven days of following [[ritu]] are together known as [[ritusandhi]] (meeting of two seasons). During this period the regimen of the previous season should be discontinued gradually and those of the succeeding season adopted slowly. Particular [[padamshika krama]] (sequential regimen) has to be adopted i.e. Unhealthy things which one has become accustomed should be discontinued gradually. Similarly healthy things (food etc.) should be made use of (gradually) with intervals of one, two or three days.[Cha.Sa.[[Sutra Sthana]] 7/36-37] On the other hand, if they are discontinued or adopted suddenly, diseases due to unaccustomed foods and activities develop.<ref> Vridha Vagbhata. Sutra Sthana, Cha.4 Ritucharya Adhyaya verse 21. In: Shivaprasad sharma, Editor. Ashtanga Sangraha. 3rd ed. Varanasi: Chaukhamba sanskrit series office;2012</ref> It is a significant advice, as the changeover of external environment from one season to other is very rapid, but our endogenous system needs some time for smooth change over. | The last seven days of preceding [[ritu]] and first seven days of following [[ritu]] are together known as [[ritusandhi]] (meeting of two seasons). During this period the regimen of the previous season should be discontinued gradually and those of the succeeding season adopted slowly. Particular [[padamshika krama]] (sequential regimen) has to be adopted i.e. Unhealthy things which one has become accustomed should be discontinued gradually. Similarly healthy things (food etc.) should be made use of (gradually) with intervals of one, two or three days.[Cha.Sa.[[Sutra Sthana]] 7/36-37] On the other hand, if they are discontinued or adopted suddenly, diseases due to unaccustomed foods and activities develop.<ref> Vridha Vagbhata. Sutra Sthana, Cha.4 Ritucharya Adhyaya verse 21. In: Shivaprasad sharma, Editor. Ashtanga Sangraha. 3rd ed. Varanasi: Chaukhamba sanskrit series office;2012</ref> It is a significant advice, as the changeover of external environment from one season to other is very rapid, but our endogenous system needs some time for smooth change over. |