What is glue ear?
Glue ear, known medically as otitis media with effusion, is a condition where the middle ear — the space behind the eardrum — fills with a sticky, glue-like fluid instead of air. This fluid stops the eardrum and the tiny bones of the middle ear from moving freely, which dampens the transmission of sound and causes hearing to become dulled or muffled. It is one of the most common ear conditions of early childhood.
Glue ear is not usually painful and is not the same as an acute ear infection, though the two are related and glue ear often follows an infection or a cold. The middle ear is normally kept ventilated and drained by a small passage called the Eustachian tube, which runs to the back of the nose; in young children this tube is shorter and more easily blocked, which is part of why glue ear is so common in childhood and usually improves as children grow.
Symptoms of glue ear
The main effect of glue ear is on hearing, and because young children may not complain directly, parents and carers often notice it through behaviour. Common signs and symptoms include:
- •Dulled or muffled hearing, or difficulty hearing in noisy settings
- •Turning up the volume on the TV, or not responding when called
- •A child seeming inattentive, or asking for things to be repeated
- •Delayed or unclear speech, particularly with prolonged glue ear
- •A feeling of fullness or pressure in the ear (in older children who can describe it)
- •Occasional mild balance problems or clumsiness
- •Usually little or no pain, unlike an acute ear infection
What causes glue ear?
Glue ear develops when the Eustachian tube — the passage that ventilates and drains the middle ear — does not work properly, so fluid that normally drains away instead builds up behind the eardrum. In young children this tube is naturally shorter, narrower and more horizontal than in adults, making it more easily blocked, which is why glue ear is so much more common in early childhood and generally becomes less of a problem with age.
Several things can contribute: recent colds or ear infections, which cause inflammation and fluid; enlarged adenoids at the back of the nose, which can block the tube; allergies; and exposure to cigarette smoke, which is a known risk factor. Glue ear is also more common in winter and in children who attend nursery, where colds spread easily. It is nobody's fault — it largely reflects the normal anatomy of a young child's ear.
How is glue ear treated?
Because glue ear so often clears up by itself, the usual first approach is 'active observation' — a period of watchful waiting, typically around three months, during which the child is monitored to see whether the fluid resolves on its own, as it does in most cases. During this time, no specific treatment is usually needed, and antibiotics are generally not helpful because glue ear is not an active infection. Managing colds and avoiding smoke exposure can help.
If glue ear persists beyond about three months and is affecting a child's hearing, speech or development, further treatment may be considered. The most common is a small operation to insert grommets — tiny tubes placed in the eardrum that let air into the middle ear and allow the fluid to drain, restoring normal hearing. Grommets usually fall out naturally after several months to a year. Occasionally removing enlarged adenoids is done at the same time. Hearing aids are sometimes an alternative.
Glue ear, hearing and development
The main reason glue ear is taken seriously, despite usually being harmless and temporary, is its effect on hearing during an important period for a child's development. When hearing is dulled for a prolonged time in a young child, it can affect the development of speech and language and, in school-age children, learning and concentration. This is why monitoring hearing, and treating persistent glue ear, matters even though the condition itself is benign.
The reassuring news is that the hearing loss from glue ear is temporary and reversible — once the fluid clears or is drained, hearing returns to normal, and any effect on speech or learning usually catches up. Parents who are concerned about a child's hearing, speech, attention or progress at school should mention it, as a simple hearing test can check for glue ear and, where needed, treatment can restore hearing promptly.
When to see a doctor
It is worth seeing a doctor if you are concerned that your child is not hearing well, if their speech seems delayed or unclear, or if they seem inattentive or are struggling at nursery or school, as glue ear is a common and easily checked explanation. A hearing test can confirm whether fluid is affecting hearing. Because glue ear often clears on its own, the doctor may recommend a period of watchful waiting before considering treatment.
You should seek advice sooner if a child has ear pain, discharge from the ear, or signs of an acute ear infection alongside the hearing changes, as these may need different treatment. Persistent glue ear affecting hearing, speech or development over more than a few months should be reviewed, as this is when treatments like grommets are considered. For most children, though, glue ear is a passing phase that resolves with time.