Excessive, less and improper use of the sense organs, intellectual aberration and transformation that occurs with time are the three major causes of disease.
A disease is understood by five factors – etiological or causative factors, prodromal symptoms, clinical features of the disease, pathogenesis and investigative therapies.
Diseases are classified in to two – curable and incurable. Curable diseases are either easily curable or difficult to cure. Incurable are either manageable or untreatable.