Kaal Sarp Dosh occurs when all seven planets come between Ketu and Rahu in a horoscope. Therefore, the person with such a horoscope is affected by Ketu and Rahu. This is known as Sarp Dosh and is believed to have very adverse effects. To be free of these adverse effects the person must do the Kaal Sarp Dosh Puja in Ujjain.

The individual seeking the puja is required to fast for the entire day. The priest starts the puja by invoking Lord Shiva and other deities to bless the individual seeking the puja. The puja involves the chanting of mantras, offering flowers, fruits and other items, and performing special rituals to reduce the malefic effects of the dosha.