An infected ear typically announces itself with pain, a feeling of fullness or pressure, and some degree of muffled hearing. These are the hallmarks, but the specific combination of symptoms depends on which part of your ear is affected. Ear infections fall into three categories based on location: outer ear, middle ear, and inner ear. Each produces a distinct set of signs you can learn to recognize.
Signs of a Middle Ear Infection
The middle ear, the small air-filled space behind your eardrum, is the most common site of infection. When fluid and mucus get trapped there, the area swells and reddens, producing a recognizable pattern of symptoms:
- Pain in one or both ears, often sharp or throbbing
- Muffled hearing, as if you’re underwater
- Drainage from the ear, which can appear if the eardrum ruptures under pressure
- Fever
- Sore throat, since the tubes connecting your middle ear to your throat are involved
A middle ear infection (called acute otitis media) usually comes on suddenly. The pain tends to worsen when you’re lying down because the change in position increases pressure behind the eardrum. Many people notice their hearing returns to normal once the infection clears, though fluid can linger for weeks afterward.
Signs of an Outer Ear Infection
An outer ear infection affects the ear canal, the tube running from your outer ear to your eardrum. It’s often called swimmer’s ear because moisture trapped in the canal creates an environment where bacteria thrive. The symptoms are different enough from a middle ear infection that you can usually tell them apart.
The earliest sign is itching inside the ear canal, followed by increasing pain. The hallmark test: if gently tugging on your earlobe or pressing the small flap of cartilage in front of your ear canal (the tragus) makes the pain worse, that strongly suggests an outer ear infection. A middle ear infection doesn’t cause this kind of tenderness to touch.
As the infection progresses, the canal swells and reddens. You may notice drainage that ranges from clear to yellowish or green, and it can be thin or thick. Foul-smelling discharge is common with bacterial infections. In more advanced cases, the swelling narrows the canal enough to muffle your hearing.
Signs of an Inner Ear Infection
Inner ear infections are less common but produce the most disorienting symptoms. The inner ear houses structures responsible for both hearing and balance, so when it becomes inflamed, the effects go well beyond ear pain.
Symptoms often appear suddenly and include:
- Vertigo, a spinning sensation even when you’re sitting still
- Nausea and vomiting triggered by the vertigo
- Hearing loss in the affected ear
- Tinnitus, a ringing or buzzing sound
- Blurred vision and difficulty concentrating
- Balance problems that make walking feel unsteady
If your main symptoms are dizziness and balance issues rather than ear pain, an inner ear infection is the likely culprit. The vertigo can be severe enough to keep you in bed for days.
What Ear Drainage Tells You
Fluid leaking from your ear is one of the clearest signs of infection, but what the fluid looks like offers clues about what’s happening. Clear, thin drainage often signals a less severe infection or fluid buildup. Yellowish or green drainage, especially if it’s thick or smells foul, typically means pus is present, pointing to a bacterial infection that may need treatment.
Drainage from a middle ear infection means the eardrum has likely ruptured under pressure. This sounds alarming, but it actually tends to relieve pain because the built-up pressure escapes. Small eardrum perforations usually heal on their own within a few weeks.
How to Spot an Ear Infection in Babies and Toddlers
Young children get ear infections far more often than adults, and they can’t always tell you what hurts. Watch for tugging or pulling at one or both ears, which is one of the most reliable behavioral clues. Unusual fussiness, crying that’s hard to console, and trouble sleeping are also common. Some children develop a fever or seem to have difficulty hearing (not responding to their name, turning up the TV).
Babies and toddlers may also refuse to eat. The act of sucking and swallowing changes pressure in the middle ear, which makes feeding painful when the ear is infected.
How Doctors Confirm an Ear Infection
You can strongly suspect an ear infection based on symptoms, but confirmation requires looking at the eardrum. Doctors use a lighted instrument called an otoscope to check for telltale signs: a bulging eardrum, redness, or visible fluid behind the membrane. A moderately to severely bulging eardrum is the strongest visual indicator of an active middle ear infection.
Some doctors use a version of the otoscope that puffs a small burst of air at the eardrum. A healthy eardrum moves freely in response. One that barely moves suggests fluid is trapped behind it. This technique is 70% to 90% accurate at detecting middle ear fluid.
Warning Signs That Need Urgent Attention
Most ear infections resolve with time or straightforward treatment, but a small number progress to a more serious condition called mastoiditis, where infection spreads to the bone behind the ear. Watch for swelling, redness, or tenderness of the skin directly behind the ear. On darker skin tones, this area may look purplish rather than red. A high fever alongside worsening ear pain is another red flag.
Facial weakness or paralysis on the side of the infected ear is rare but requires immediate medical care. The same goes for sudden, significant hearing loss, confusion, or a stiff neck, all of which can signal the infection is spreading beyond the ear.