Ear infection: symptoms, causes and treatment explained
Ear infections are one of the most common reasons people seek medical advice, particularly in children, although adults can also be affected. They can cause significant discomfort, hearing problems and, in some cases, complications if left untreated.
Understanding the condition can help individuals recognise when to seek medical attention and how to reduce the risk of future ear infections.
What is an ear infection?
An ear infection occurs when bacteria or viruses cause inflammation within the ear. The ear is divided into three main parts: the outer ear, the middle ear and the inner ear. Most ear infections affect either the outer ear or the middle ear. While many ear infections resolve on their own, some require medical treatment to prevent complications.
Types of ear infection
Ear infections can affect different parts of the ear, and each type has distinct symptoms and treatment approaches.
Outer ear infection (otitis externa)
Often referred to as “swimmer’s ear”, this type of ear infection affects the ear canal. It commonly develops when moisture becomes trapped in the ear, creating an environment where bacteria can grow.
Typical symptoms include:
- Ear pain, particularly when touching the ear.
- Itching inside the ear canal.
- Redness or swelling.
- Discharge from the ear.
Middle ear infection (otitis media)
This occurs behind the eardrum and is particularly common in young children. It often develops following a cold, flu or throat infection, when fluid builds up in the middle ear and becomes infected.
Symptoms may include:
- Ear pain.
- Fever.
- A feeling of pressure in the ear.
- Temporary hearing loss.
- Irritability in children.
- Fluid draining from the ear in some cases.
Causes and risk factors
Ear infections are typically caused by bacteria or viruses that lead to inflammation and fluid accumulation. Several factors can increase the likelihood of developing an ear infection.
Common risk factors
- Recent colds or upper respiratory infections.
- Allergies.
- Swimming or excess moisture in the ear.
- Using cotton buds or inserting objects into the ear.
- Weakened immune system.
- Young age (in children, the ear structures are still developing).
Environmental factors, such as exposure to cigarette smoke, may also increase the risk.
Treatment options
Treatment depends on the type and severity of the ear infection.
For mild ear infections, symptoms may settle within a few days with simple measures such as:
- Pain relief medication (for example paracetamol or ibuprofen).
- Rest and hydration.
Outer ear infections are commonly treated with medicated ear drops to reduce infection and inflammation.
Middle ear infections sometimes resolve without antibiotics, particularly if caused by a virus. However, antibiotics may be prescribed if symptoms are severe, persistent, or affect vulnerable patients.
In recurrent or chronic cases, an ENT specialist may recommend further investigation or treatments such as ear microsuction or, in children, small ventilation tubes (grommets).
When to see a specialist
Medical advice should be sought if:
- Ear pain is severe or worsening.
- Symptoms last more than a few days.
- Significant hearing loss occurs.
- Fluid or pus is draining from the ear.
- Ear infections occur repeatedly.
Early assessment can help prevent complications and ensure the most appropriate treatment.
How to prevent ear infections
While not all ear infections can be avoided, certain measures may reduce the risk:
- Keep ears dry after swimming or bathing.
- Avoid inserting cotton buds or objects into the ear.
- Treat allergies and colds promptly.
- Maintain good hand hygiene to reduce infections.
- Ensure children receive recommended vaccinations.
Ear infections are common and usually manageable, but they can be painful and disruptive if not treated appropriately. Recognising the symptoms early and seeking medical advice when necessary can prevent complications and support quicker recovery.