Ear pain almost always traces back to one of a handful of causes: an infection in the middle or outer ear, pressure buildup from a blocked tube, impacted earwax, or pain referred from your jaw or teeth. Figuring out which one you’re dealing with comes down to where exactly it hurts, what makes it worse, and whether you have other symptoms like fever, drainage, or muffled hearing.
Middle Ear Infections
The most common reason for a sudden, deep earache is a middle ear infection. It typically follows a cold or upper respiratory illness. Congestion causes the eustachian tube, a narrow passage connecting the back of your throat to your middle ear, to swell shut. Fluid gets trapped behind the eardrum with no way to drain, and bacteria or viruses multiply in that warm, stagnant pocket. The result is a throbbing, pressure-like pain deep inside the ear, often accompanied by fever, muffled hearing, and difficulty sleeping.
Children are far more susceptible because their eustachian tubes are shorter and more horizontal, making them easier to block. More than 80% of children have at least one ear infection by age 3. But adults get them too, especially during allergy season or after a bad cold.
Most middle ear infections clear on their own within a few days. For mild cases, especially in children older than 2 with pain in only one ear, a “watchful waiting” approach is reasonable. Over-the-counter pain relievers like ibuprofen or acetaminophen can manage discomfort in the meantime. When antibiotics are needed, amoxicillin is the standard first choice.
Outer Ear Infections (Swimmer’s Ear)
If the pain gets noticeably worse when you tug on your earlobe or press the small flap of cartilage at the front of your ear canal, the problem is likely in the outer ear rather than behind the eardrum. This is swimmer’s ear, an infection of the skin lining the ear canal. Water that stays trapped after swimming, showering, or even humid weather creates a breeding ground for bacteria.
Early on, you may notice mild discomfort, slight redness inside the canal, and a feeling of fullness. As the infection progresses, the canal can swell enough to partially or completely block it, with fluid and pus draining out. The outer ear itself may become red and swollen. Unlike middle ear infections, swimmer’s ear rarely causes fever unless it becomes severe.
Eustachian Tube Dysfunction
Sometimes the pain isn’t from an infection at all. Your eustachian tubes are responsible for equalizing air pressure on both sides of the eardrum. When they don’t open properly, due to allergies, sinus congestion, or swelling from a cold, negative pressure builds up in the middle ear. This creates a dull ache, a plugged sensation, and sometimes popping or crackling sounds when you swallow or yawn. Flying on an airplane or driving through mountains can make it dramatically worse because of rapid altitude changes.
The discomfort usually resolves once the underlying congestion clears. Swallowing, yawning, or gently blowing with your nose pinched (the Valsalva maneuver) can help force the tubes open temporarily.
Impacted Earwax
A buildup of hardened earwax pressing against the eardrum or the walls of the ear canal can cause a surprisingly sharp ache, along with muffled hearing and a sensation of fullness. Ironically, the most common cause of impacted wax is trying to clean your ears with cotton swabs, which pushes wax deeper rather than removing it.
If you suspect wax buildup, resist the urge to dig it out with a swab, hairpin, or any other object. You risk puncturing the eardrum or pushing the blockage further in. A healthcare provider can remove impacted wax safely using a small curved tool, suction, or a warm water flush. Over-the-counter softening drops containing carbamide peroxide can help, but use them only as directed since they can irritate delicate ear canal skin. Ear candling does not work and can cause burns. Essential oils like tea tree or garlic oil have no evidence supporting their use for wax removal.
Referred Pain From Your Jaw or Teeth
Here’s one many people don’t expect: an earache that isn’t actually coming from the ear. The trigeminal nerve supplies sensation to your upper and lower teeth, your jaw muscles, and portions of your ear and face. When something irritates this nerve at one location, your brain can misread the signal as ear pain.
Two common culprits are jaw joint problems and dental infections. Temporomandibular disorders (often called TMJ issues) can produce aching near or inside the ear, sometimes with ringing, a sense of fullness, or even mild hearing changes. The pain tends to worsen with chewing, clenching, or wide yawning. A tooth infection, particularly in the upper molars, can send referred pain to the ear through the same shared nerve pathways. Inflammation from the infected tooth spreads to surrounding tissues, puts pressure on nearby nerves, and triggers jaw muscle tension, all of which your brain may interpret as an earache.
If your ear looks normal, you have no fever, and the pain gets worse when you chew or clench your jaw, a dental or jaw issue is worth investigating. There’s no single definitive test for TMJ disorders, so diagnosis typically involves a detailed history of your pain: where it is, what triggers it, and whether it radiates.
When Ear Pain Needs Urgent Attention
Most earaches resolve within a few days, but certain signs mean you should get evaluated promptly. These include a fever of 102.2°F (39°C) or higher, pus or fluid draining from the ear, noticeable hearing loss, or symptoms that worsen or persist beyond two to three days. For infants under 3 months, any fever of 100.4°F (38°C) or above warrants immediate medical attention.
One red flag that requires emergency care: redness, pain, or swelling of the bone directly behind the ear, or the ear appearing to be pushed forward. This can indicate mastoiditis, a serious infection of the skull bone behind the ear that develops when a middle ear infection spreads.