Otitis externa is a painful inflammation of the skin in the ear canal. This skin is protected from bacteria by a layer of earwax. When the protective layer disappears or the skin in the ear canal is damaged, this may lead to otitis externa. Otitis externa, as well as otitis media, falls under the heading of ‘ear infection’.
The ear canal is lined with a thin layer of skin. In the ear canal, there are over a thousand glands that produce earwax. Earwax is acidic and fatty. Irritation of the skin may cause inflammation. The skin can get irritated by:
A narrow ear canal is more prone to inflammation. In case of diseases like eczema, psoriasis or (contact) allergy, inflammation of the ear canal is more common. A bacterial or fungal infection is sometimes the cause. Apart from that, the cause of otitis externa is not always clear.
An otitis externa can lead to the following signs and symptoms:
The ear, nose and throat (ENT) specialist makes the diagnosis of otitis externa based on the patient’s symptoms and examination of the ear. Sometimes, additional examination is necessary, for example making a culture, taking X-
In case of otitis externa, ear drops containing an acid and a corticosteroid (adrenocorticotropic hormones) help. Sometimes, the ear canal must first be syringed by the general practitioner.
If the ear canal is very swollen, the patient may get an ear tampon to reduce swelling first. This should remain there one day. With ear drops, the ear tampon must be well kept wet. Use paracetamol in case of severe earache. If paracetamol doesn’t help, try an anti-
Otitis externa usually heals within one to three weeks. If the symptoms return, the patient can still use ear drops each time after swimming (or other contact with water) or as soon as the symptoms occur.
External Otitis, Swimmer's Ear