If your snoring is the bane of your partner's life, then you might just have a new excuse.
Scientists have discovered that the tongues of some people who snore are extra large.
It's already well-known that being overweight or obese increases the risk of obstructive sleep apnoea (OSA), which leads to snoring because the airway becomes blocked.
Until now, it was thought that a large neck was to blame.
Now, however scientists say piling on the pounds can also cause a fat tongue - which may well be the culprit.
U.S. researchers found that obese people with OSA had a higher percentage of tongue fat - especially at the base of their tongues - which made their tongues larger overall.
This was compared with obese people who didn't suffer from the sleep condition.
Increased tongue fat might prevent the tongue's muscles from positioning the tongue away from the airway, causing snoring because the airway becomes blocked, researchers said.