Leo rules the heart, spinal cord, liver metabolism, spleen, pulmonary arteries and aorta, superior and inferior vena cava. Leo governs the back and forearm.

The diseases of Leo mainly involve the heart, most seriously occlusion of cardiac arteries by blood clot or occlusion bringing on a heart attack. Nervous tension can affect the heart with palpitations and the like. The fire of Leo tends to fevers, especially heart-related issues such as "pericarditis" and rheumatic heart disease and is linked to jaundice and eye problems.

Leo Women's health problems are generally related to heart, the spinal column and bones. Their health problems also stem from a view that everything should run according to their wish and when it fails to happen they get irritable and majorly stressed.

Physiologically, Leo governs the upper back, forearms, wrist, spine and heart. The ailments related to Leo are pain in the back and lungs, spinal complaints, diseases of the heart and blood, sickness in ribs and sides, convulsions, pleasantries, violent burning fevers including, in former days when they were prevalent, plague and pestilence jaundice and some afflictions of the eyes.

They should take care by way of proper food and regular exercise. They should take very long walks and do a lot of physical work to ward off the stress from their body. All spicy and stimulating foods and drinks should be avoided. Recommended foods for Leo is spinach, raisins, and dates and plums, pears, and oranges etc.