Sleep Apnea headache involves pressing pain on both sides of the head. It usually happens in the morning after waking up. According to older research Trusted Source, sleep apnea - A condition where a person stops breathing periodically during the night affects about 3% to 5% of middle-aged adults. A headache upon waking happens in 12–18% of those with Sleep Apnea. For more information Visit our website: http://cantsleepcenter.com