7 Symptoms That You Don’t Breathe Well While Asleep

SLEEP APNEA SIGNAL: YOUR MORNING BEGINS WITH A POUNDING HEADACHE

“When you don’t breathe at night, you’re deprived of oxygen,” says Dr. Breus. “When you’re deprived of oxygen, your brain doesn’t like it, so you’ll have a pretty decent headache early in the morning.”

This isn’t a specific type of headache, but it usually goes away within an hour or two of awakening, as your brain gets the oxygen it needs after a night of struggling.