Several causes can cause Sleep apnea:
a) Obesity
Obesity causes enlarged tissues in the mouth and throat that can block airflow and interfere with breathing during sleep. It also increases the pressure in the lower part of the stomach, which can push the esophagus backward into the throat. This can cause snoring. Over time, snoring can result in chronic sleep apnea.
b) Tonsils or Adenoids
Tonsils and adenoids are round lumps of lymph tissue that help protect the body from infections. They are high in the throat behind the nose and roof of the mouth.
Infected or enlarged tonsils and adenoids can cause snoring, breathing at night, and other problems. When these symptoms are not treated, they can lead to sleep apnea.
c) Head and Neck Disorders
Head and neck disorders can also contribute to the development of sleep apnea, as they can lead to airway obstruction and other breathing problems.