Aetiology (Hetu) What creates disease
Symptomotology (Linga) What is created
Therapeutics (Aushadha) How to reverse it
(Ca, Sutra. 1:4)
Causative factors (Nidana) Explains what creates disease
Pathology (Samprapti) Explains what is created
Treatment (Chikitsa) Principles of reversing disease
Diseases can be diagnosed by the study of aetiology, premonitory symptoms, actual symptoms, exploratory therapy and pathogenesis.
(Ca, Nidana 1:7)
On the basis of these factors, the physician with peace of mind and unimpaired intellect should understand the disease properly.
(Ca, Nidana. 1:13)