The diseases originating from amashaya are cured by langhana (fasting), only whereas only a single disease entity jwara also can be treated by the single therapy of langhana (fasting).
तथा लघ्वशनाद्याश्च ज्वरस्यैकस्य शान्तयः | एताश्चैव ज्वरश्वासहिक्कादीनां प्रशान्तयः ||३२||
For treating a single disease like jwara, multiple therapies like light diet, etc. are needed and the same multiple therapies like light diet etc. are needed to subside many diseases like jwara(fever), shwasa(dyspnea), hikka(hiccups) etc.
[Prognostic aspect in therapy] Easily curable diseases can be managed in a short time by simple measures. Diseases which are difficult to cure may require more effort and time to cure. The palliable variety of incurable diseases can never be cured, but can be alleviated. Incurable diseases are not amenable to any type of treatment.
Conversely, incurable diseases never become curable, while the curable varieties may become incurable due to factors like incompetence of the four components of health management (the physician, the medicine, the attendant and the patient) and/or misfortune.
The easily curable kinds may also become difficult to cure, if not incurable, while diseases that are difficult to cure may become palliable and palliable variety may become incurable.