As this is the nearest root, the diseases related to head is best treated by this procedure. Acharya Charaka has described that Nasa is the only gateway to Shirah(head)

Diseases of head and neck is caused by poor and sedentary lifestyle, such as lack of physical activity, chronic stress due to stressful work culture, smoking, overuse of alcohol and imbalanced diet

It is the only procedure that nourishes the Indriyas(sensory organs) directly.

Medicines administered through nasal route absorbs directly through blood vessels thereby, bypasses the digestion mechanism and act quickly.