Devotees take a holy dip in the temple tank before worshipping Vaitheeswaran in the temple. It is also a local belief that dissolving jaggery (Tamil:vellam) in the waters cures skin diseases. Tonsure ceremony of getting children shaved for the first time to promote proper growth is a very common practise. Mavilaku ma (litting lamp in rice cakes) is a form of worship practised. The practise of jamming salt and pepper in front of the temple mast and the pot near the temple tank is also followed. Unlike other temples in South India, where each shrine has a priest, each priest in the temple associates themselves with the devotees and perform worship on their behalf.
The holy soil rounded with ash (called Thiruchandu Urundai) is treated as medicine and believed to cure all the diseases. Another medicine given is chandan (sandalwood powder) with saffron. It is a practice to purchase silver-plated images of body parts to put in the Hundi (vessel for offering) to fix ailments one might be having. The Veeraraghavaswamy temple at Thiruvallur is considered the Vaishnavite temple equivalent of healing abilities of the presiding deity to that of the Saivite Vaitheeswaran Kovil.