Kal means that death and Sarpa means snake. The person born under Kal Sarpa Yog passes through sufferings and agonies throughout the life. Astrologically, when the planets alternative than the outer planets are beneath the nodal influence of Rahu and Ketu, this conjunction is treated as “Sarpa Dosha” or “Kaal Sarpa Dosha”. In other words Sarpa Dosha is mentioned to be happened once all the planets are hemmed on one facet between Rahu and Ketu.