Furunculosis is a localized form of otitis externa resulting from infection of a single
Inflammation of Hair follicle.
Hair follicle are only present in the lateral segment of the external auditory canal.
It is therefore,confined to the lateral canal.
As the infection progresses a pustule forms & this progresses to local abscess
5. Risk Factor
People at risk
Teenage & young adults
Pt on Immunosuppressive drugs
• Staphylococcus aureus,
pseudomonas & proteus
• Local risk factors like heat,
humidity, trauma & maceration.
• Severe conditions appear to be
associated with recurrent
7. History Collection - The
affected ear is extremely painful
On palpation - the pinna &
tragus are tender.
Lab test CBC - ↑ WBC
C & S
8. Oedema & inflammation is restricted to
the lateral segment of the canal with
relative medial canal & TM.
If the oedema & celullitis spreads to the
post-auricular crease, the condition may
mistake for acute mastoiditis.
9. Management options
otic Analgesics drops - Antipyrine, Benzocaine
Oral /systemic antibiotics
1. Macrolide- Clarithromycin, Azithromycin, Erythromycin
2. Cephalosporin - cephalexin, Cefazolin
Quinolone - Ciprofloxacin, gemifloxacin
Oral antibiotic recommended in early stage of disease.
10. Topical treatment
2. Astringents - to reduce bleeding from minor abrasions
e.g. Topical aluminium chloride , aluminium acetate solution
3. Hygroscopic agents - dehydrating agents
e.g. aluminium acetate solution, Magnesium Carbonate.
Glycerol & 10% Ichthammol solution is hygroscopic &
11. • Incision & drainage.
• For recurrent furunculosis
Eradication therapy with oral flucloxacillin for 14 days.
Correction of specific biochemical abnormalities (hypoferraemia, low serum
zinc) may lead to marked reduction of recurrent infections.
If untreated, progress to abscess then discharge to EAC.
Adequate drainage the infection will resolve spontaneously.
Infection may spread to deeper plain pinna, post-auricular skin, parotid
Repeated infection can cause permanent scarring , fibrosis &stenosis of
External Auditory Canal (EAC).
13. Patient Education
• Warm compresses applied to the area for 20 minutes at least 3–4 times a day
may ease the discomfort and help encourage to drain.
• It can be very contagious. Do not share clothing, towels, bedding, or sporting
equipment with others
• Wash hands frequently
• Do not pop with a pin or needle. Doing so may make the infection worse.