The most reliable signs of an ear infection are ear pain that comes on quickly, muffled hearing, and a feeling of fullness or pressure deep inside the ear. In children too young to describe their symptoms, pulling or tugging at the ear, unusual fussiness, trouble sleeping, and crying more than normal are the key behavioral clues. If these symptoms appear alongside a recent cold or upper respiratory illness, an ear infection is especially likely.
But ear pain alone doesn’t confirm an infection, and not all ear infections feel the same. The type of infection, where it’s located, and whether it involves active bacteria or just trapped fluid all change what you’ll experience.
Middle Ear Infection Symptoms
A middle ear infection is the most common type, especially in children. It happens when fluid builds up behind the eardrum and becomes inflamed or infected, usually after a cold or sinus congestion blocks the narrow tube that drains the middle ear. The trapped fluid creates pressure against the eardrum, which is what causes that deep, throbbing pain.
In adults, the typical symptoms are:
- Sharp or aching pain deep inside one ear
- Muffled hearing or a sensation of fullness
- Fluid draining from the ear (this means the eardrum has ruptured, which actually tends to relieve the pain)
- Fever
- Headache
In children, the signs are harder to pin down. Babies and toddlers can’t tell you their ear hurts, so watch for ear tugging, difficulty sleeping, increased crying or fussiness, loss of appetite, trouble responding to sounds, and problems with balance. A fever alongside any of these makes an ear infection more likely.
Outer Ear Infection Symptoms
An outer ear infection, often called swimmer’s ear, affects the ear canal rather than the space behind the eardrum. It usually starts with itching, then progresses to pain that can become severe. The ear canal is a tight space with little room for swollen tissue to expand, which is why even a mild outer ear infection can feel disproportionately painful.
The key difference from a middle ear infection is how the pain behaves. With swimmer’s ear, pain gets noticeably worse when you pull on your earlobe, push on the small flap at the front of your ear, or chew. You may also see flaky skin debris or pus draining from the canal. Middle ear infections don’t typically hurt more with external pressure on the ear.
Fluid Without Infection
Sometimes fluid stays trapped in the middle ear after an infection clears up, or it accumulates without an active infection at all. This condition causes fullness in the ear and mild hearing loss, but little to no pain and no fever. Most people describe it as feeling like their ear is plugged or like they’re hearing underwater.
This trapped fluid can reduce hearing by blocking the normal vibration of the eardrum. The hearing loss is temporary and typically mild, but in children it can be enough to affect speech development if it persists for months. The fluid usually resolves on its own, though it can take weeks. If your ear feels full and your hearing is slightly off but you’re not in pain, this is likely what’s happening.
What Else Causes Ear Pain
Not every earache is an ear infection. The ear shares nerve pathways with the jaw, teeth, and throat, so problems in those areas can produce pain that feels like it’s coming from inside the ear. Two of the most common mimics are jaw joint disorders and dental problems.
Jaw-related ear pain has a distinctive pattern: it changes with jaw movement. If your ear pain gets worse or better when you chew, clench your teeth, talk, or yawn, the source is likely your jaw joint rather than your ear. Pressing on the muscles along the side of your jaw near the temple and cheekbone will often reproduce the familiar pain. Importantly, jaw problems don’t cause fever, ear drainage, swelling, redness, or hearing loss. If you have any of those, something else is going on.
Dental infections, sore throats, and tonsil problems can also send pain to the ear. The distinguishing factor is usually the absence of the classic ear infection package: no fullness, no hearing changes, no drainage, no fever.
How Doctors Confirm It
A definitive ear infection diagnosis requires someone looking at the eardrum with an otoscope. Doctors look for specific changes: a bulging eardrum is the strongest sign, especially when it’s moderate to severe. Mild bulging combined with recent ear pain (within the past 48 hours) or significant redness of the eardrum also points to active infection. Fluid draining from the ear that isn’t caused by an outer ear infection is another confirming sign.
Critically, if there’s no fluid behind the eardrum, it’s not a middle ear infection, regardless of how much the ear hurts. Doctors check for fluid by using a pneumatic otoscope, which puffs a small amount of air against the eardrum to see how it moves. A healthy eardrum moves freely; one with fluid behind it stays stiff.
Home ear cameras are becoming more popular, but their diagnostic accuracy is limited. Even when paired with smartphone apps using image recognition software, the best systems achieve around 80 to 87% accuracy in research settings, and real-world performance tends to be lower. They can give you a look inside the ear canal, but interpreting what you see requires training. A normal-looking ear canal doesn’t rule out a middle ear infection, since the problem is behind the eardrum.
How Long Ear Infections Last
Most middle ear infections improve on their own within two to three days. The immune system can often clear the infection without antibiotics, which is why many doctors use a “watchful waiting” approach: they may hold off on prescribing antibiotics for the first 48 to 72 hours to see if symptoms resolve. Some will write a prescription but ask you to wait before filling it. Both bacteria and viruses cause middle ear infections, and antibiotics only help with bacterial ones.
If symptoms aren’t improving after two to three days, or if they’re severe from the start (high fever, intense pain, symptoms in both ears in a young child), antibiotics are typically started right away. Most people feel significantly better within a day or two of starting treatment, though the fluid behind the eardrum can take weeks to fully drain.
Warning Signs of Spreading Infection
Ear infections rarely become dangerous, but when they spread to the bone behind the ear (the mastoid bone), the situation becomes serious. Watch for redness, swelling, warmth, or tenderness in the area behind the ear, especially if the outer ear starts to push forward or stick out from the head. High fever that doesn’t respond to treatment is another red flag.
In 6 to 23% of cases where infection reaches the mastoid bone, it can spread further to involve the brain or its surrounding membranes. Signs of this include severe headache, neck stiffness, seizures, confusion, or vision changes. Facial drooping on the same side as the infected ear, sudden ringing in the ear, or new dizziness can also indicate the infection is spreading to nearby nerves or the inner ear. Any of these symptoms alongside an ear infection need immediate medical attention.