What causes glue ear?
You may get glue ear after having a cold or an infection of your ear, nose, or sinuses.
Your eustachian tube connects your middle ear to the back of your nose and throat, allowing air to come into the middle ear and letting fluid drain out.
But if this tube becomes blocked, for example from mucus caused by an infection, then fluid in your ear builds up and can become sticky like glue, affecting your hearing.
In rare cases, the eustachian tube can be blocked by extra tissue at the back of the nose.