Its a constant condition until treated often misdiagnosed as depression it causes instead exhaustion apathy and fatigue from which doctors simply cant tell the difference generally as they cant often diagnose apnea a lot don't actually even know anything about it here in the UK .It is quite often fatal as it effects your heart bp and general health and often ends up causing brain damage and mental illness according to psychiatrists ,although clinically a lot of the damage to white and grey cells can be repaired with the right treatment .You have to wear a mask every night or have your throat operated on to make sure it stays open at night and you breathe properly