Sleep masks come in different varieties, but the most common sleep mask for sleep apnea sufferers is one that fits over the nose; this is usually most comfortable. However, there are some breathing masks that cover both the nose and mouth. There is also a type of CPAP mask that inserts small prongs into the nostrils.
Sleep masks are connected to CPAP machines or related breathing machines. A CPAP machine provides continuous air pressure that lets a person with sleep apnea breathe normally and sleep well all night long. This sleep apnea treatment can also alleviate snoring and other sleep disorder symptoms.
Sleeping with a mask on can take some getting used to, but it's a worthwhile investment for people with moderate or serious sleep apnea. Since it's important to use your sleep mask every night, you'll want to be sure that yours fits comfortably.