In Vedic medical astrology (Ayur-Jyotisha), the Sun (Surya) is the supreme karaka (significator) for vitality, the soul (Atma), and overall health. As the source of life force (Prana Shakti), it governs the heart, eyes, bones, spine, blood circulation, and immune system. An afflicted Sun—through weak placement, malefic aspects (e.g., from Saturn, Rahu, or Ketu), or combustion—can indicate chronic ailments, fevers, or vitality loss. Conversely, a strong Sun (exalted in Aries or in its own sign Leo) bestows robust health and resilience.
This synthesis of astrology and Ayurveda, as explored in texts like Brihat Parashara Hora Shastra and Charaka Samhita, helps predict predispositions to diseases. The Sun's position in signs and houses reveals specific vulnerabilities, but always consider the full chart, aspects, dasha periods, and Navamsa (D-9) for accuracy. Afflictions amplify risks, while benefics like Jupiter mitigate them.
As detailed in foundational works like Astrology Guide for Everyone: Basics & Principles of Jyotisha by Suripeddi Koundinya, understanding these placements empowers preventive remedies through mantras, gems (e.g., ruby for Sun), and lifestyle adjustments.