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Obstructive sleep apnea (OSA) is characterized by episodes of complete collapse of the airway or partial collapse with an associated decrease in oxygen saturation or arousal from sleep. This disturbance results in fragmented, nonrestorative sleep.

What are the causes of obstructive sleep apnea?

Factors that increase the risk of this form of sleep apnea include:
  • Excess weight. Obesity greatly increases the risk of OSA
  • Neck circumference. People with thicker necks might have narrower airways
  • A narrowed airway
  • Family history
  • Use of alcohol, sedatives or tranquilizers
  • Smoking
  • obesity.
  • having a large neck.
  • getting older – although children and young adults can also get it.
  • having other family members with sleep apnoea.
  • smoking and drinking alcohol.
  • having large tonsils or adenoids.
  • sleeping on your back.
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