Saravana Poigai is the name of a pool in the Himalayas, from whose waters the divine child, Saravana Poigai Muruga, is believed to have emerged. Hence he got the name Saravana Bhava. Saravana Poigai pools in Muruga shrines are sources of redemption. Accumulated sins are thought to be destroyed by a dip here. As fire consumes fuel, so too this sacred pool consumes the sins of the wicked.
The Saravana Poigai at Thiru Aavinankudi has drawn uncounted millions to its banks. It has a hoary tradition and a bath or at least a symbolic use of its waters over your head is a prerequisite for entering the sanctum sanctorum.