Pitra Dosh is believed to be a dosha or affliction in one's horoscope caused by the negative influence of departed ancestors. It is considered inauspicious and can bring various challenges and obstacles in life.

Pitra Dosh is identified by studying the positioning of planets, especially Rahu and Ketu, in an individual's birth chart. Afflictions to the ninth house or the presence of malefic planets can contribute to the formation of Pitra Dosh.

Pitra Dosh is believed to cause various problems such as financial difficulties, health issues, delays in marriage, and obstacles in career. It is also associated with difficulties in having children and strained relationships.

Pitra Dosh Puja is often performed on specific days considered auspicious, such as Mahalaya Amavasya or during the Pitru Paksha, a fortnight dedicated to honoring ancestors. It can also be done on any auspicious date recommended by a priest.

Pitra Dosh Puja is typically performed by individuals who believe they have Pitra Dosh in their horoscope. It is often done by family members seeking relief from ancestral afflictions.

Pitra Dosh Puja is performed at holy places, temples, or specific locations suggested by a priest. It can also be conducted at home with the guidance of a knowledgeable person.

The main rituals include prayers, offerings, and homam (fire ceremony). Devotees may also perform tarpan (offering water), pind daan (offering rice balls), and other rituals to appease the departed ancestors.

The effectiveness of Pitra Dosh Puja is a matter of faith. Many people believe that performing the puja with sincerity and devotion can alleviate the negative effects associated with Pitra Dosh.