A device which may be used in the treatment of snoring sickness. An air blower supplies high volume air at slightly greater than atmospheric pressure to a flexible tube (2). Such air is communicated via tube (2) through nose piece (3), further through flexible tube (4) and a restrictive air outlet device (9). Communicating with nose piece (3) is a face mask (5) adapted to be sealingly attached to a patient's nose and providing communication between the patient's nostrils and the interior of nose piece (3). By varying the restriction of device (9) the air pressure at the region of nose piece (3) and also the patient's nostrils can be varied.