A bump inside your ear is most often a pimple, a cyst, or a small infection, and it’s rarely something serious. The location, size, and pain level of the bump can tell you a lot about what’s causing it. Here’s what the most common culprits look like and when a bump deserves medical attention.
Pimples and Infected Hair Follicles
The most common reason for a painful bump inside the ear canal is a blocked or infected hair follicle. Your ear canal contains tiny hairs and oil glands, and when one gets clogged with dead skin or oil, it forms a pimple just like anywhere else on your body. These bumps tend to be small, red, and tender to the touch, especially when you press on the outer ear or insert an earbud.
Wearing earbuds frequently, using dirty earphones, or habitually putting your fingers in your ears increases your risk. Most of these pimples resolve on their own within a few days. Gently washing the area twice a day with an antibacterial cleanser can help speed things along. One important rule: don’t try to pop it. Squeezing a pimple inside the ear can push bacteria deeper, cause a worse infection, and even scar the delicate skin of the ear canal.
Cysts in the Ear Canal
If the bump feels firm, round, and isn’t particularly painful, it may be a cyst. Epidermoid cysts are the most common type found in the ear canal. They form when skin cells get trapped beneath the surface and slowly fill with a protein called keratin. These cysts are benign and often grow slowly, ranging from 2 mm to 20 mm depending on their location. Cysts deeper in the bony part of the ear canal tend to be smaller (averaging about 3.5 mm), while those in the outer, cartilaginous portion can grow larger (averaging around 9.5 mm).
Nearly half of ear canal cysts are discovered by accident during an exam for something else entirely, meaning many people have them without symptoms. When they do cause problems, you’ll typically notice a feeling of fullness, mild pain, or visible swelling. A cyst can sit unchanged for years, then suddenly grow or become inflamed if its wall ruptures. If it gets infected, a doctor can drain it with a small incision to relieve pressure and speed healing.
Outer Ear Infections
Sometimes what feels like a bump is actually swelling from an outer ear infection, commonly called swimmer’s ear. This happens when water gets trapped in the ear canal, creating a warm, moist environment where bacteria thrive. The canal becomes inflamed and irritated, and the swelling can feel like a lump when you touch it. Pain, redness, and sometimes discharge are the hallmarks.
Treatment typically involves antibiotic eardrops combined with a steroid to reduce swelling. Oral antibiotics are generally unnecessary for straightforward cases. While you’re healing, keep water out of the ear and resist the urge to scratch or insert anything into the canal. The lymph nodes near the ear can also swell during an infection, creating a noticeable bump just in front of or behind the ear that resolves once the infection clears.
Bony Growths (Surfer’s Ear)
If you spend a lot of time in cold water, the hard bump you’re feeling could be a bony growth called an exostosis. These develop when repeated exposure to cold water and wind triggers the bone of the ear canal to grow extra layers of tissue. Among surfers, the prevalence ranges from 26% to 73%, with risk increasing significantly in water colder than 66°F (19°C). The growths are usually multiple, appear on both sides, and sit as broad, smooth elevations along the canal walls.
A related but different growth called an osteoma is a solitary, stalked bony bump that attaches at a specific point inside the ear canal. Osteomas aren’t tied to cold water exposure. Both types are benign, but if they grow large enough to trap water or debris, they can cause recurring infections or hearing loss, and surgical removal becomes an option.
Keloids From Piercings
If your bump is near a piercing site, it could be a keloid. These are firm, rubbery masses of scar tissue that form after minor trauma to the skin, with ear piercings being the most common trigger. Unlike normal scars, keloids grow beyond the boundaries of the original wound and can range from flesh-colored to pink to dark brown. They sometimes itch or hurt and can grow large enough to distort the shape of the ear.
Keloids occur more frequently in people with darker skin, including those of African American, Asian, and Hispanic descent, and most people first develop them after puberty. A keloid won’t go away on its own. Treatment options include steroid injections to shrink the tissue, surgical removal, or a combination of both, though recurrence is common.
Congenital Preauricular Pits
Some people are born with a tiny hole or dimple near the front of the ear, right where the upper ear cartilage meets the face. This is a preauricular pit, a congenital feature that’s present from birth. It can appear on one or both ears. Most of the time it causes no problems at all, but the narrow tract beneath the surface can occasionally become infected, producing a painful, swollen bump near the opening. Recurrent infections sometimes require surgical removal of the entire tract.
When a Bump Could Be Something Serious
The vast majority of ear bumps are harmless, but a few warning signs point to something that needs prompt evaluation. Basal cell carcinoma, the most common skin cancer affecting the ear, appears as a flesh-colored or pinkish bump with a pearly border, sometimes with a central sore that doesn’t heal. Squamous cell carcinoma looks more like a scaly, firm, irregular patch that may crust or bleed.
Contact a healthcare provider if you notice any of these: a bump that bleeds or oozes without explanation, a sore on the ear that won’t heal after several weeks, unexplained hearing changes, persistent dizziness, or a painless lump that keeps growing. Skin cancers on the ear are highly treatable when caught early, so getting an unusual bump checked is worthwhile even if it turns out to be nothing.