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Do Ear Infections in Adults Need Antibiotics? An ENT in Gangnam, Seoul Explains

Answered by Dr. Kim Yoo Suk, MD · Board-certified otolaryngologist · Former professor, Yonsei & Ajou University · Consultations in English

First, which part of the ear is infected?

"Ear infection" can mean several different conditions, and treatment differs for each. An examination of the ear canal and eardrum is the key step.

Outer ear infection (otitis externa)

Otitis externa is an infection of the skin of the ear canal, often after swimming, showering, or scratching with cotton swabs or ear picks. It causes pain when the outer ear is touched or pulled, itching, swelling, and sometimes discharge. Treatment is usually:

• Professional cleaning of the canal so drops can reach the skin
• Antibiotic ear drops, sometimes combined with a steroid
• Keeping the ear dry during healing
• Oral antibiotics only when infection spreads beyond the canal or in people with diabetes or weakened immunity

Middle ear infection (acute otitis media)

Acute otitis media is infection behind the eardrum, usually following a cold. Adults typically have deep ear pain, muffled hearing, sometimes fever, and occasionally discharge if the eardrum perforates. In adults, oral antibiotics are commonly prescribed when the diagnosis is confirmed, particularly with severe symptoms. Pain relief is important, and the ear is rechecked to make sure it has cleared.

Fluid without infection (otitis media with effusion)

Fluid behind the eardrum after a cold causes fullness and muffled hearing but no acute infection. Antibiotics do not help. Treatment focuses on the nose and Eustachian tube, and persistent fluid may need drainage.

Chronic otitis media

Chronic otitis media involves long-standing infection or discharge, often with an eardrum perforation. It may need cleaning, drops, and sometimes surgery.

When to see a doctor promptly

• Severe ear pain, high fever, or discharge
• Swelling or redness behind the ear, or the ear pushed outward
• Facial weakness, severe dizziness, or confusion
• Sudden hearing loss
• Ear symptoms in people with diabetes or weakened immunity

What we do at Gangnam Yonsei ENT

Dr. Kim Yoo Suk, a board-certified otolaryngologist and former Yonsei clinical assistant professor, examines the ear with magnification to identify exactly which part is affected. When debris blocks the canal, professional ear cleaning allows both accurate diagnosis and effective drops. Tympanometry checks for fluid behind the eardrum, and a hearing test can assess any hearing change.

Antibiotics are prescribed when they are likely to help, with clear instructions on drops or tablets. For fluid that does not clear, myringotomy may be discussed. Because the ear and nose are connected, nasal causes such as allergies or sinusitis are also treated when they contribute.

Tips while you heal

• Keep water out of the ear when showering, using a cotton ball with petroleum jelly
• Do not insert cotton swabs or earphones into an infected ear
• Avoid swimming until your doctor confirms healing

English consultations and English medical certificates are available; see our English-speaking ENT page. Related: swimmer's ear versus middle ear infection and whether a perforated eardrum heals.

Related questions

Can an adult ear infection go away without antibiotics?

Some mild middle ear infections improve on their own, and fluid without infection does not need antibiotics. However, adults with confirmed acute otitis media and significant symptoms are commonly treated. An examination determines the right approach.

Why do ear drops work better than pills for outer ear infections?

Drops deliver a high concentration of antibiotic directly to the infected skin of the ear canal, with fewer side effects than tablets. For them to work well, the canal often needs to be cleaned first so the drops can reach the skin.

Can I fly with an ear infection?

Flying with a middle ear infection or blocked Eustachian tube can be painful during descent. If you must travel, see a doctor first for treatment and advice. Swallowing and chewing during descent help equalize pressure.

This answer is general medical information written and reviewed by an ENT specialist. It is not a diagnosis. Please see a doctor for an examination. In an emergency in Korea, call 119.