Ear tubes are small, hollow cylinders made of plastic or metal that a surgeon inserts into the eardrum. They create a tiny opening that lets air flow into the middle ear and prevents fluid from building up behind the eardrum. The medical name for the procedure is tympanostomy, and it’s one of the most common childhood surgeries performed today.
How Ear Tubes Work
Your middle ear connects to the back of your throat through a narrow passage called the eustachian tube. That passage has three jobs: equalizing air pressure in the middle ear, bringing in fresh air, and draining fluid. In young children especially, the eustachian tube is shorter and more horizontal than in adults, which makes it prone to swelling shut during colds or allergies. When that happens, fluid gets trapped behind the eardrum with no way out.
An ear tube bypasses the eustachian tube entirely. It sits in a tiny incision in the eardrum and acts as an alternate airway, keeping pressure equalized and giving trapped fluid a path to drain. Think of it like cracking a window in a stuffy room. The tube is so small that it’s barely visible, even when looking directly at the eardrum with a specialized scope.
Who Needs Ear Tubes
Most candidates are children between one and three years old, though adults occasionally need them too. Current clinical guidelines lay out specific situations where tubes are recommended:
- Persistent fluid in both ears for three months or longer with documented hearing difficulties. This condition, sometimes called “glue ear,” can muffle sound enough to interfere with speech development.
- Recurrent ear infections where fluid is still present in one or both ears at the time of evaluation. If a child keeps getting infections but the fluid clears between episodes, tubes are generally not indicated.
- Chronic fluid with related symptoms like balance problems, poor school performance, behavioral changes, ear discomfort, or reduced quality of life, even without a formal hearing test showing loss.
A single episode of fluid buildup lasting less than three months is not enough to warrant surgery. Many cases resolve on their own during that window, which is why doctors typically take a watch-and-wait approach first.
Short-Term vs. Long-Term Tubes
There are two broad categories of ear tubes, and the choice depends on how long ventilation is needed. Short-term tubes, often called grommets (the Shepard grommet is the most commonly used), are small and shaped like a spool. They’re designed to stay in place for several months and then fall out on their own as the eardrum heals underneath them. Most grommets work their way out within 6 to 18 months.
Long-term tubes, sometimes called T-tubes because of their shape, are designed to stay in the eardrum for years. They’re typically reserved for children who have already had grommets fall out and the fluid problem returned, or for situations where the eustachian tube is expected to remain dysfunctional for a long time, such as in children with cleft palate. T-tubes don’t fall out on their own and usually need to be removed by a surgeon.
What the Surgery Looks Like
The procedure takes 8 to 15 minutes on average. Children receive general anesthesia, most commonly through a breathing mask rather than an IV. The surgeon uses a microscope to make a tiny incision in the eardrum, suctions out any trapped fluid, and places the tube in the opening. There are no external incisions and no stitches.
Most children are awake and alert within minutes of the procedure ending. Some are irritable or groggy for a short period, but the recovery is fast. Many kids return to normal activities the same day or the next. You may notice fluid draining from the ear in the first few days, which is normal and expected. It’s the trapped fluid finally making its way out.
How Much Hearing Improves
Fluid trapped behind the eardrum acts like a sound barrier. Children with persistent fluid in both ears can experience mild to moderate hearing loss, enough to make speech sound muffled or distant. Within one to three months of tube placement, hearing thresholds improve by about 9 decibels on average. That’s a meaningful difference, roughly equivalent to the difference between hearing someone speak clearly across a room versus hearing them through a closed door.
For young children in the critical window for language development, that improvement can have a noticeable effect on speech, behavior, and engagement. The hearing improvement is often immediate once the fluid drains, though formal testing typically happens at a follow-up visit a few weeks later.
Water Exposure and Daily Life
Whether kids with ear tubes need to avoid water is one of the most debated questions among ear surgeons. Most agree that ears should stay dry in the immediate days after surgery. After that initial period, recommendations vary widely from one doctor to the next.
The best available evidence suggests the risk is real but small. One well-designed study found that children who wore earplugs while swimming and bathing had an average of 0.84 ear drainage episodes per year, compared to 1.2 episodes in children who didn’t use plugs. That’s roughly one fewer drainage episode every three years. Another study of 212 children found no difference at all between those who avoided water and those who didn’t. Surface swimming and normal bathing are generally low risk. Diving or submerging the head in deeper water pushes more water through the tube and carries a higher chance of infection.
Your child’s surgeon will give you specific guidance based on the type of tube placed and your child’s history. Many now take a relaxed approach to regular bathing and surface swimming while recommending plugs for lake or pool diving.
How Long Tubes Stay In
Short-term tubes are designed to fall out on their own, and the eardrum heals closed behind them. A large analysis of over 2,200 tubes found that about 30% had come out by 6 months, roughly 60% by 9 months, and around 90% by 24 months. You often won’t notice when it happens. The tube is tiny enough to sit in the ear canal or fall out undetected. Your doctor will check tube position at regular follow-up visits.
If a tube stays in longer than expected, particularly beyond two to three years, the risk of a persistent hole in the eardrum increases. Among tubes in place for fewer than three years, only 3% left a permanent perforation after removal. For tubes in place longer than three years, that rate jumped to 15%.
Risks and Complications
Ear tube surgery is considered very safe, but no procedure is risk-free. The most common issue is ear drainage, where fluid or pus comes out through the tube during a cold or upper respiratory infection. This is actually the tube doing its job, letting infected fluid drain outward instead of building up behind the eardrum, but it may need treatment with antibiotic ear drops.
Scarring of the eardrum, called tympanosclerosis, is common after tubes and shows up as small white patches on the eardrum. It looks dramatic under a microscope but rarely affects hearing in any meaningful way.
Persistent perforation, where the hole doesn’t close after the tube comes out, occurs in about 11% of cases overall. The rate varies by tube type and duration. Short-term grommets left in place for a typical period carry a much lower risk than long-term tubes. If a perforation doesn’t close on its own within several months, a minor surgical repair can seal it.
Some children need a second set of tubes. The underlying eustachian tube dysfunction that caused the original problem doesn’t always resolve after one round, especially in younger children whose anatomy is still maturing. Repeat tube placement follows the same quick procedure as the first.