As per the Vedic Astrology Mandhi is an Upagraha. Which is also called as Kuligan.In Kerala all the prediction are made based on Mandhi. In the “SARVARTHA SINDHAMANI”   it was told that Mandhi is the son of Sani (Saturn) . Sani (Saturn) is also called as “Mandhan” thus the name Mandhi is arrived. While casting the horoscope the Mandhi’s position is to be ascertained as per the Udhayathi Nazhikai on the particular day. This has been elaborately  mentioned by Dr.B.V.Raman in his “Foundations of Astrology” Mandhi has no own house like Raghu, Kethu. Since the Mandhi is the son of Sani (Saturn) it will take more access in Makaram & Kumbam (Capricorn & Aquarius), The Mandhi will take position where it is stand and act according the Bhavam like Raghu and Kethu. When Sani (Saturn) is placed in  Makaram & Kumbam (Capricorn & Aquarius) it will give full benefit according to lagnam but the Mandhi will give such benefit half the way.

Mandhi’s aspect is to the three houses (like Guru)  namely 2nd, 7th and 12th house. Mandhi will the Sani’s Karakathvam in half the way.

By analyzing the Mandhi one can able to find out the all dhoshas, diseases. Mandhi is malefic planet.