An ear infection in a baby shows up as a combination of behavioral changes you can observe at home and physical signs a doctor can see by looking inside the ear. Since babies can’t tell you their ear hurts, you’ll rely on cues like ear tugging, unusual fussiness, trouble sleeping, and sometimes fluid draining from the ear. About half of babies with ear infections also run a fever, typically between 100.5°F and 104°F.
What a Doctor Sees Inside the Ear
A healthy eardrum is gray and slightly translucent. You can actually see tiny bones through it. When a baby has an acute ear infection (called acute otitis media), the eardrum looks dramatically different: it becomes bulging, red, and opaque, losing that normal translucency and light reflex. The bulging and redness are the key findings that distinguish an active infection from fluid simply sitting behind the eardrum without infection.
You won’t be able to see these changes yourself. They require an otoscope, the handheld instrument with a light and magnifying lens that your pediatrician uses. But understanding what the doctor is looking for can help you make sense of the diagnosis. If the eardrum is opaque and retracted but not bulging, that points more toward fluid buildup without active infection, which is a less urgent situation.
Behavioral Signs You’ll Notice at Home
Babies communicate ear pain through their behavior. The most common signs include tugging or pulling at one or both ears, increased fussiness and crying that seems out of proportion to what’s happening, and difficulty sleeping. Lying down increases pressure in the middle ear, which intensifies the pain. That’s why many parents notice their baby is fine during the day but miserable at bedtime or during naps.
You might also notice your baby is less interested in feeding. Sucking and swallowing change the pressure in the ear canal, which can make eating uncomfortable. Some babies with ear infections become clingier than usual or seem generally “off” in ways that are hard to pinpoint but obvious to a parent who knows their child’s baseline.
Fever and Other Physical Symptoms
About half of children with ear infections develop a fever, which can range from 100.5°F to 104°F. The fever often appears alongside or shortly after a cold, since upper respiratory infections are the most common trigger for ear infections in babies. You may also notice your baby seems less responsive to sounds or doesn’t react to noises that would normally get their attention. Fluid behind the eardrum dampens sound transmission, creating temporary muffled hearing. This usually resolves once the infection clears, but if your baby stops reacting to familiar voices or loud sounds, it’s worth mentioning to your pediatrician.
Fluid Draining From the Ear
Sometimes you’ll see actual fluid coming out of your baby’s ear. This happens when pressure from the infection causes the eardrum to rupture, allowing trapped fluid to drain into the ear canal. The drainage can be clear, yellowish, greenish, or even bloody. It may be thin or thick, and it sometimes has a foul smell.
Seeing fluid leak from your baby’s ear is alarming, but a ruptured eardrum from an ear infection typically heals on its own within a few weeks. Ironically, many babies feel immediate relief once the eardrum ruptures because the painful pressure drops. If healing hasn’t occurred within three to six months, complications can develop, so your doctor will want to follow up.
Ear Infection vs. Teething
This is one of the trickiest distinctions for parents because teething and ear infections share several symptoms: ear rubbing, irritability, trouble sleeping, and mild fever. The overlap exists because teething pain, especially from molars, radiates along the jawline and can make babies rub their ears and cheeks even though the problem is in their mouth.
A few differences can help you sort it out. Teething fevers tend to stay below 101°F, while ear infection fevers often climb above 102°F. Teething babies drool heavily and gnaw on everything they can reach, and you may be able to see or feel a swollen bump on their gums. Ear infection babies tend to pull at their ears more forcefully and consistently, and their pain gets worse when lying down. Fluid draining from the ear is a definitive sign of infection, not teething. And if the fussiness started during or right after a cold, an ear infection is the more likely culprit.
Why Babies Get Ear Infections So Often
Babies and toddlers get far more ear infections than adults, and the reason is structural. The tube connecting the middle ear to the back of the throat (the eustachian tube) is shorter and more horizontal in children. In adults, this tube sits at about a 27-degree angle and measures roughly 43 mm long. In children, it’s only about 20 degrees and around 37 mm long. That flatter, shorter path makes it easier for fluid and bacteria from a cold to travel into the middle ear space and get trapped there. As children grow and the tube lengthens and tilts, ear infections become less frequent.
What Happens After Diagnosis
Treatment depends on your baby’s age, whether one or both ears are infected, and how severe the symptoms are. For babies six months and older with moderate to severe symptoms, or with a fever at or above 102.2°F, or with both ears infected, antibiotics are the standard approach. For milder cases in babies older than six months with only one ear affected, your doctor may recommend a “watchful waiting” period of two to three days. This gives your baby’s immune system a chance to fight the infection on its own before starting antibiotics.
During that waiting window, you’ll monitor whether symptoms improve, stay the same, or worsen. If your baby still has ear pain or isn’t improving after two to three days, your doctor will typically start antibiotics at that point. For babies under six months, doctors generally treat with antibiotics right away rather than waiting.
Most ear infections resolve within a week to ten days, whether they clear on their own or with antibiotics. Fluid behind the eardrum can linger for several weeks after the infection itself is gone, which may cause continued mild hearing muffling. This is normal and usually resolves without intervention. If your baby has repeated infections, three or more in six months or four in a year, your pediatrician may discuss options to reduce their frequency.