A method of treatment and a nasal delivery device for dosages containing dissolved gaseous carbon dioxide in saline fluid for treating head ailments includes: a) a main housing having a hollow central area containing the dosage b) a dosage dispenser head located at the distal end of the main housing, having at least one flow channel for movement of the dosage from the main housing through the dosage dispenser head and externally of the dosage dispenser head c) a dosage release control component located between the main housing and the dosage dispenser head to permit flow of the dosage through the dosage dispenser head in response to increased pressure against the dosage at a flow rate of less than 1 cc per second and d) a pressure-changing moveable component located on the main housing.
