Medical Astrology helps to diagnose from signs, houses and planets. The causes of ill-health can be known well before its actual appearance in the human body through Vedic astrology horoscope. When bad planets influence the bad houses, then it leads to severe ill health. The planets represent forces or energies which loose in the world, diseases are likewise represented by energies, thus a parallel became delineated and the one came to represent the other in this system. Diseases came to be seen and depicted very much as manifestations of these planetary energies. They shared the same qualities and attributes and thus could substitute for one another easily. This constitutes one of the fundamental foundations of medical astrology.