Nose is believed to be the entrance of the head or brain. Shirovirechana eliminates the increased doshas situated in the head. In this process medication is given through the nose. The medicine might be in powder forms that are blown into the nostrils through certain specific instruments or in the form of medicated oils, which is applied with the help of a dropper.

Sirovirechana can be performed to maintain health or in diseases like headache, hicca (hiccups), manyastambha (cervical spondylosis), Swarabhransha (Sore Throat), Epilepsy, Skin disorders etc.

When Nasya is performed breathing process becomes smooth and the indriyas like ears, eyes, nose, throat, tongue strengthens and improves their function.