Kaal Sarp Dosha is a belief in Hindu astrology. It's believed to be a negative influence caused by the alignment of all the planets between Rahu and Ketu, the lunar nodes, within a person's birth chart. This alignment is thought to bring about various challenges and obstacles in one's life.

There are different variations of Kaal Sarp Dosha depending on the positioning of Rahu and Ketu in the birth chart. Some believe it brings misfortunes related to health, career, relationships, and overall well-being. However, interpretations and beliefs about Kaal Sarp Dosha vary among different astrologers and regions.

It's important to note that while astrology holds significance for many, it's not universally accepted or scientifically proven. Some people may take such beliefs seriously and seek remedies or rituals to mitigate its effects, while others may not give it much credence.