<    Thickened tissues in the nasal passages, which can sometimes result from some surgeries unrelated to snoring

<    Overuse of nasal sprays which irritate the nasal passageway

<    Enlarged adenoids and/or tonsils

<    Goiter (swelling of the an ineffective thyroid gland in the neck)

<    A disproportionately large tongue that blocks airflow

<    Ineffective regulation and neural control of mucus membranes

<    Obesity and excess weight (leading to an enlarged neck and excess soft tissue in the trachea)*

<    Excess gut/belly (relatively decreasing the size of the lungs)*

<    Drinking alcohol**, which: