What causes shortness of breath when waking up?

Shortness of breath upon waking can be caused by several factors, including sleep apnea, where airway obstruction occurs during sleep, leading to disrupted breathing. Other potential causes include Asthma, heart conditions, or anxiety. Additionally, lying flat during sleep can exacerbate conditions like congestive heart failure, resulting in fluid accumulation in the lungs. If this symptom persists, it's important to consult a healthcare professional for a thorough evaluation.