As per legends, Prajapati Daksha's daughters had married the devas, but the youngest daughter, Sati had chosen to marry Lord Siva against her father's wish. Daksha was not keeping good relation with his son-in-law Lord Siva. Daksha to insult Lord Siva, decided to perform big Yagna, for which he invited all the gods and goddesses, except Lord Shiva, to partake their offerings.
When Sati on knowing this Yagna, decided to visit her maternal house, though she was not invited. Sati who was offended by the scoldings of her father immolated herself in the fire of Yogagni generated by her. Angered by this, Siva ordered Veerabhadra to destroy Daksha Yagna. Veerabhadra along with Kali and other Siva Ganas destroyed to Yajna and killed Daksha.
Lord Siva after collecting Sati's body, danced the dance of destruction 'Pralaya Thandavam'. To stop this destruction, Vishnu sent his disc (Sudarshana Chakra) to break the corpse of Sati body into pieces. The disc broke the corpse into 18 pieces, which fell across the Indian subcontinent. These 18 places were called by Sakthi Peethas. Pithapuram is the place where Peeta part from Sati's body fallen here.