<unk>  is a physical disorder. The exact causes may vary depending on the person. Weight loss is a commonly cited cause of the disorder due to the nature of the Eustachian tube itself and is associated with approximately one-third of reported cases. Fatty tissues hold the tube closed most of the time in healthy individuals. When circumstances cause overall body fat to diminish, the tissue surrounding the Eustachian tube shrinks and this function is disrupted. Activities and substances which dehydrate the body have the same effect and are also possible causes of<unk> . Examples are stimulants (including caffeine) and exercise. Exercise may have a more short-term effect than caffeine or weight loss in this regard. Pregnancy can also be a cause of<unk>  due to the effects of pregnancy hormones on surface tension and mucus in the respiratory system. Granulomatosis with polyangiitis can also be a cause of this disorder. It is yet unknown why.<unk>  can occur as a result of liquid residue in the Eustachian tube, after suffering a middle ear infection (otitis media). * Radiation therapy * High levels of estrogen * Nasal decongestants * Stress * Sudden weight loss * Neurological disorders
Patulous Eustachian tube
Eustachian tube dysfunction
Persistent thyroglossal duct
Salivary gland hypoplasia
Velopharyngeal insufficiency
Salivary gland atresia
Tracheal agenesis
Velopharyngeal inadequacy