Vaitheeswaran Koil is a Hindu temple dedicated to the Shiva, located in the Indian state of Tamil Nadu.[3] Shiva is worshipped as Vaidyanathar or Vaitheeswaran meaning the "God of healing" and it is believed that prayers to Vaitheeswaran can cure diseases.
Vaitheeswaran is a Tamil derivative from vaidya (Doctor) and Ishvara (God/Master). The presiding deity is Sri vaidyanathan, facing towards West whereas East side is the common one. He is the God of Healing. When pronouncing in Tamil, it sounds like "vaideeswaran".
The village is also known for palm leaf astrology called Naadi astrology in Tamil. It is located 7 kilometers from Sirkazhi, 235 kilometers from Chennai, 27 km from Chidambaram, 110 km from Thanjavur and 13 km from Mayiladuthurai.
The temple is revered by the Tevaram hymns of 7th-century Saiva nayanars - Tamil saint poets and is also classified as a Paadal Petra Sthalam (temple revered by the nayanars).