A very ancient temple of Lord Siva Sri Vaidyanatha Swamy and Ammai Sri Thaiyal Nayagi. The other deities are Panchamoorthys, Muthukumaraswami (Lord Murugan), Angaragan(Planet Mars) , Dhanvandri, Jadayu, Badrakali, and Sixty Three Nayanmars.

Pul (Jadayu) rikku (Rik Veda) Vel (Murugan) Oor (Sun God) worshipped here and hence the name Pullirukku Velur. The belief is that, to cure the irremediable diseases will be cured, Uma appeared as Thaiyal nayagi with a bowl of herbal solution, the (sanjeevani?) herb and the holy soil under the Vilva tree (Botanical name: Aegle marmelos). The Lord (Shiva) appeared as Vaidyanathar (one who cures, the divine doctor) at this shrine. Even today the shrine is popular for curing various diseases and devotees throng here on ‘Kiruthigai’ (Karthigai, the third star of the 27) . The deity Selva Muthukumaraswamy (Lord Murugan) is well-known. On the day of the Karthigai star special poojas are conducted for him. The sandal paste, particles of soil, sidhamirtham are known for their curing powers. Off the navagrahas of Hindu mythology, this shrine is celebrated for Angaragan (Sevvai – planet mars). As per Hindu mythological stories, once the planet mars (Angaragan – one of the navagrahas) got a deadly disease and worried. He was told by unmanned voice to visit the temple at Vaitheeswaran Kovil. When he visited here his disease was cured by Lord Shiva ( who came in the form of divine doctor along with his consort Parvathi) . So the lord here is called as Vaitheeswaran (a doctor).