or in an untimely condition, his disorders will aggravate dreadfully due to complications of dhumapana. [Method of dhumapana (smoke inhalation)] The person eligible for dhumapana should inhale the smoke through nose in case of diseases of the head, nose and eye.
Dhumapana is advised through mouth in case of diseases of throat. The person who has inhaled smoke through the nose shall exhale it by the mouth, but should not exhale it through nose,
because the smoke traversing in the reverse direction injures the eyes quickly. One should cautiously inhale smoke through one nostril after closing the other nostril, thrice in each round, thus for three rounds,
in comfortable sitting position with straight body and eyes with concentration of mind. Dhuma netra (nozzle of smoking pipe) For the smoke inhalation for errhine purpose,
the smoking pipe should be of the length twenty-four fingers breadth, measuring with one’s own finger; For unctuous smoke, it should be of thirty-two fingers; and for daily smoke it should be longer by a half than the first.