FURUNCULOSIS OF EXTERNAL AUDITORY CANAL
• It is also known as acute localised otitis externa / circumscribed otitis externa.
• This is a localised infection usually found to involve the lateral 1/3 of the external canal.
• It also has a propensity to involve the posterior superior aspect of the external canal. This is caused due to obstruction of the apopilosebaceous units found extensively in this area.
• Trauma to skin in this area followed by infection is commonly attributed cause.
• The organism responsible is commonly staphylococcus aureus.
- Localised pain
- Localised itching
- Purulent discharge if the abscess ruptures
- If oedema or abscess occludes the external canal hearing loss can occur.
- Erythema of the skin
- Localised abscess formation
- Positive tragus sign
- Obliteration of retroauricular groove
• Avoid water entry
• Oral antibiotics should be used.
• The preferred drug of choice is penicillin of ﬁrst generation cephalosporins.
• Topical antibiotics plus steroid ear drops
• Anti inﬂammatory drugs can be used to reduce inﬂammation and pain.
• If the abscess is pointing it can be treated by incision and drainage.
• These patients must be advised to cut their nails short and to keep their hands clean, since this is the commonest route of infection.