Last updated: August 15, 2026 · 8 min read I recently had a restless night due to shortness of breath, which made it difficult to lie down. After sitting up, the breathing became easier. Needless to say, I got little or no sleep that night. Even after being overwhelmed by sleep, the difficulty breathing triggered a powerful reflex that woke me. This breathing reflex is crucial, as it helps ensure that the body receives oxygen and eliminates carbon dioxide even when not fully conscious. However, such breathing problems at night can have adverse effects on sleep quality and quantity, and therefore, overall health and well-being.