Because the Linga had been under an Marudha tree for a long time, the water used for bathing the lingam is supposed to contain healing properties. During the Kongu Chola Vikrama Cholan III's (1302 A.D) rule Vikrama Cholan Tirubhuvana Singhan had diabetes. He worshipped Arjuneswarar and donated lands to the temple. He got cured and hence there is a belief that praying to Arjuneswarar cures one of diabetes.