Seasons are the natural global earth clock and the rhythm of the world. Equinox and solstice make the two main divisions of the seasons, which further divide into four seasons. The same seasonal phenomenon is found inside the body of each being living in this world. Tibetan Medicine and Buddhist tantras explain that the external seasons exist because of the solar and lunar systems. Similarly, the internal solar and lunar channels reflect the phenomenon and give the internal seasons. Most people know the seasons, but few of them know their effects on the body/mind and their prevention.