Siddha medicine is a traditional Tamil system of medicine originating in ancient Tamilakam in India. It considers nature and humans as essentially one, with the human body made up of combinations of five primordial elements - earth, water, fire, air and space. Diagnosis evaluates factors like pulse, voice, tongue, body, excrement and urine. Treatment aims to restore balance to the three doshas (humors) - vatham, pitham, and kapham - using formulations made from herbal and mineral substances. Siddha medicine emphasizes prevention, and treats diseases through internal medicine, external applications, and procedures tailored to each patient.