Ear Infection (Otitis Media)
Inflammation or infection in the middle ear, often causing ear pain and temporary hearing changes
Medically reviewed by a board-certified ENT specialist
- Author:
- Dr. Poj Pinyopornpanish — Otolaryngologist · Thai Board of Otolaryngology
- Medical reviewer:
- Dr. Poj Pinyopornpanish — Otolaryngologist · Thai Board of Otolaryngology
- Reviewed on:
- Last updated:
- Estimated reading time: 5 min
Overview
What is otitis media?
Otitis media is inflammation or infection in the middle ear—the air-filled space behind the eardrum. It often follows a cold or upper respiratory infection when the Eustachian tube (which connects the ear to the back of the nose) does not work well. This can allow fluid to build up and germs to enter the middle ear. Ear infections occur in both children and adults, but young children are affected more often. Symptoms and care depend on the type of infection, how long it has been present, and how severe it is. A clinical assessment helps guide appropriate management.
Symptoms
Common symptoms
Symptoms vary by age, type of infection, and whether fluid or pus is present in the middle ear.
Ear pain, often worse at night in children
Muffled or reduced hearing in the affected ear
A feeling of fullness or pressure in the ear
Fever
Irritability, crying, or pulling at the ear in young children
Poor sleep or reduced feeding in infants and toddlers
Drainage from the ear (may suggest a perforated eardrum)
Dizziness (less common)
Cold symptoms such as a blocked nose, runny nose, cough, or sore throat
Possible causes
Why ear infections happen
Middle ear infections are often linked to upper respiratory infections and Eustachian tube function.
Viral or bacterial infection
Colds, flu, or other respiratory infections may lead to inflammation in the middle ear.
Poor Eustachian tube function
The tube that connects the ear to the nose helps drain fluid and equalise pressure. If it is blocked, fluid may collect in the middle ear.
Age and anatomy
Young children have shorter, more horizontal Eustachian tubes, which may make infections more likely.
Environment and exposure
Group settings such as daycare and exposure to second-hand smoke may increase risk.
Allergy or nasal inflammation
Allergic rhinitis or sinus inflammation can affect drainage from the middle ear.
Other factors
A history of repeated infections, bottle-feeding while lying flat, or conditions affecting immunity may play a role.
When to seek care
When should I see an ENT specialist?
Many ear infections improve with time, but seek assessment if symptoms are severe, persistent, or concerning.
Severe ear pain or pain that does not improve with appropriate self-care
High fever, persistent fever, or worsening symptoms
Clear or significant hearing loss that does not improve after an acute episode
Drainage from the ear, especially if it looks like pus
Frequent repeat infections or long-standing middle ear fluid
A child who is very irritable, feeding poorly, or showing signs of dehydration
Dizziness, balance problems, or other neurological symptoms
An underlying condition or weakened immunity with worrying infection symptoms
Diagnosis
How is it diagnosed?
An ENT specialist will ask about your symptoms and examine the ear with an otoscope to assess the eardrum’s appearance and movement, and whether fluid or pus is present in the middle ear. Additional tests may be used when needed, such as hearing tests (audiometry) or tympanometry to evaluate middle ear fluid and its effect on hearing. This assessment helps distinguish otitis media from other causes, such as wax blockage or outer ear infection.
Treatment
Treatment options
Management depends on age, symptoms, duration, and examination findings. The most suitable approach is chosen after clinical assessment.
Observation and symptom relief
In selected cases, a period of watchful waiting may be appropriate, along with pain relievers and fever reducers when needed.
Antibiotics
May be considered when clinically indicated—for example, with severe symptoms, younger age, or failure to improve. They should be used only as directed.
Managing persistent middle ear fluid
If fluid remains for a prolonged period and affects hearing, monitoring or further options may be discussed based on individual findings.
Ventilation tubes
For recurrent infections or long-standing fluid, ventilation tubes (grommets) may be considered to help drainage and reduce infection frequency.
Self-care
What you can do at home
Self-care focuses on relieving symptoms and watching for signs that require further assessment.
Use pain relievers or fever reducers as advised by a clinician or pharmacist, if suitable for you
Ensure adequate fluids and rest, especially for children
Avoid exposure to cigarette smoke
Do not insert objects into the ear canal
If antibiotics are prescribed, complete the full course even if symptoms improve
Monitor fever, ear pain, hearing, and any ear drainage
Return for follow-up as advised or if symptoms persist or worsen
Prevention
Reducing the risk of ear infections
Not every case can be prevented, but certain measures may help lower risk.
Wash hands regularly and limit close contact with people who have colds
Keep vaccinations up to date, including influenza and other relevant vaccines
Avoid second-hand smoke, especially around children
Support breastfeeding in infancy when appropriate
Manage allergies or nasal congestion that may affect Eustachian tube function
Seek review if infections recur so longer-term options can be discussed
FAQ
Frequently asked questions
Common questions about ear infections, antibiotics, hearing changes, and follow-up care.
Will an ear infection go away on its own?
Many cases improve within a few days, especially viral infections. Clinical assessment helps confirm the diagnosis and determine whether medication or follow-up is needed.
Do I always need antibiotics?
Not always. Antibiotic use depends on age, symptoms, and examination findings. Your doctor will follow established clinical guidance.
Can an ear infection cause permanent hearing loss?
It often causes temporary hearing reduction while fluid is present. Hearing usually improves as the infection resolves, but persistent fluid or repeated episodes may require further monitoring.
Why are children affected more often?
Children’s Eustachian tubes are structurally different and their immune systems are still developing, which can make middle ear infections more common.
What does drainage from the ear mean?
It may occur when pressure in the middle ear causes the eardrum to rupture, allowing fluid or pus to escape. Medical assessment is recommended.
References
Related guidelines and patient resources
The sources below are recognized international guidelines and patient-education resources for general learning. They are not individualized medical advice.
Patient information on ear and hearing conditions
AAO-HNS / ENThealth
View source (AAO-HNS / ENThealth)Patient education and clinical guidance in otolaryngology
American Academy of Otolaryngology–Head and Neck Surgery (AAO-HNS)
View source (American Academy of Otolaryngology–Head and Neck Surgery (AAO-HNS))Public ENT health information
ENThealth (AAO-HNS Foundation)
View source (ENThealth (AAO-HNS Foundation))
Educational information
Medical Disclaimer
This information is intended for educational purposes only and does not replace diagnosis or treatment by a qualified physician. If you have concerning symptoms, please consult an ENT specialist.
Related links
Learn more
Related clinic pages to help you explore conditions, services, and procedures.
Ear pain or hearing changes?
An assessment can help determine whether symptoms are due to an ear infection or another cause, and what care may be appropriate for you.