What is a key symptom of obstructive sleep apnea?

A key symptom of obstructive sleep apnea is loud snoring followed by periods of apnea. This symptom is significant because it highlights the nature of obstructive sleep apnea, which involves repeated episodes of partial or complete obstruction of the airway during sleep. The loud snoring is caused by the vibration of tissues in the throat as airflow is impeded. Following these episodes of loud snoring, there may be noticeable pauses in breathing (apnea), which can disturb the sleep cycle and signal to those around the individual that something is wrong.

This specific symptom is part of the diagnostic criteria for obstructive sleep apnea, as it indicates the physical manifestations of the disorder. While excessive daytime sleepiness and persistent fatigue are also common symptoms of obstructive sleep apnea, it is the pattern of loud snoring and observed breathing interruptions during sleep that are often the most telling signs, especially from the perspective of a sleeping partner or family member.