Otitis externa is an inflammation or infection of the external auditory canal, the auricle, or both. 

What is the Pathology of Otitis Externa?

The pathology of otitis externa is inflammation of the external ear canal, ear pain, which can be severe, itchiness in the ear canal. a discharge of liquid or pus from the ear, and some degree of temporary hearing loss.

-Etiology: The cause of otitis externa is typically a bacterial infection.

-Pathogenesis: The sequence of events that lead to otitis externa is by a bacterial infection, although the condition can also be caused by irritation, fungal infections, or allergies. There are a number of things that can make patients more likely to develop otitis externa including damaging the skin inside their ear or regularly getting water in their ear.

How does Otitis Externa Present?

Patients with otitis externa typically are females that present at the age range of 45 to 75 years old. The symptoms, features, and clinical findings associated with otitis externa include ear pain, itching and irritation in and around an ear canal, redness and swelling of an outer ear and ear canal, a feeling of pressure and fullness inside the ear. Scaly skin in and around an ear canal may also be appreciated. 

How is Otitis Externa Diagnosed?

Otitis externa is diagnosed clinically based on signs and symptoms of canal inflammation. Presentation can range from mild discomfort, itching, and minimal edema to severe pain, complete canal obstruction, and involvement of the pinna and surrounding skin.

How is Otitis Externa Treated?

Otitis externa is treated effectively with ear drops. 

What is the Prognosis of Otitis Externa?

The prognosis of otitis externa is good. In most cases the symptoms will start to improve within a few days of starting treatment.