The temple is dedicated to Shiva, as the Moolavar presiding deity, in his manifestation as Karumbeswarar. His consort, Parvati, is known as Soundaranayagi. The historical name of the place is Tiruvenni.
It is also believed that patients suffering from diabetes will be cured of the disease if they make an offering of sugar to the main deity at this temple.
“Karumbu” in Tamil means sugarcane and the main linga is in the form of a bunch of sugarcane stems tied together.