Step 1: Hippocrates (Buqrat) is considered the Father of Medicine and laid the foundation of Unani principles.
Step 2: He introduced the theory of four humours (Akhlat-e-Arba’a): Dam, Safra, Sauda, and Balgham.
Step 3: Ibn Sina (Avicenna) expanded Unani medicine but Hippocrates is called the father.