Sleep apnea occurs when your ability to breathe while sleeping stops.
Telling whether you have the condition, however, is challenging, because it only happens while you are asleep. Common signs include feeling groggy in the morning, waking up gasping for breath, and frequent headaches upon waking.
If you have a partner, they may also hint that you have the condition. For instance, they might tell you that you stopped breathing in the night or were snoring heavily and jerkily.