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Paronychia treatment

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paronychia treatment management

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Here is a clinical summary of paronychia treatment based on multiple textbooks:

Paronychia: Treatment

What It Is

Paronychia is an infection of the soft tissue around the nail (lateral nail fold, cuticle/eponychium). It begins as cellulitis and may progress to frank abscess formation. S. aureus (including CA-MRSA) is the most common organism; anaerobes, streptococci, and gram-negative organisms also occur. In children, anaerobes from nail-biting/finger-sucking are common. Chronic paronychia (>6 weeks) often involves Candida albicans, especially in immunocompromised patients.

Treatment by Stage

1. Early/Cellulitic (No Fluctuance)

  • Warm soaks 3x/day
  • Elevation of the hand
  • Oral antibiotics - broad-spectrum antistaphylococcal agent (e.g., cephalosporin or semisynthetic penicillin); cover MRSA if clinically suspected (e.g., TMP-SMX or doxycycline)
  • Topical antibiotics ± topical corticosteroids can be used
  • Incision has no role at this stage

2. Abscess Present (Fluctuance or Visible Pus)

  • Digital nerve block before any procedure
  • Drainage is the definitive treatment:
    • For minor infections: elevate/lift the eponychial fold with a flat probe or #11 blade (parallel to nail) to allow pus to drain - no skin incision needed
    • For more extensive infections: incise directly into the area of greatest fluctuance with a #11 blade; gently probe with a small clamp to ensure drainage
    • Avoid incisions across the eponychial fold to prevent nail deformity
  • Nail removal is rarely required as the initial step; reserve for:
    • Pus beneath the nail (remove lateral or proximal nail portion)
    • Free-floating nail on a bed of pus (full nail removal needed)
  • Post-I&D care: warm soaks to keep wound open and clean; elevate and immobilize the hand; reassess within 48 hours in complicated cases

3. Post-Drainage Antibiotics

Routine antibiotics are NOT needed after successful I&D unless:
  • Significant cellulitis remains
  • Patient is immunocompromised
  • Vascular insufficiency is present
When used, a 7-day course is standard.

4. Chronic Paronychia (>6 weeks)

  • Topical corticosteroids + topical antifungal agents (e.g., for Candida)
  • Avoid wet environments/prolonged water exposure
  • Referral to dermatology is appropriate

Special Considerations

  • MRSA coverage: Consider TMP-SMX or clindamycin if CA-MRSA is suspected (risk factors: recent antibiotic use, healthcare exposure, known community MRSA prevalence)
  • HIV/immunosuppressed patients: higher risk of atypical organisms, fungal infection, and antiretroviral therapy-associated paronychia
  • Epidermal growth factor receptor (EGFR) inhibitors / FGFR inhibitors: drug-induced paronychia - manage the underlying medication and use topical antibiotics/antiseptics
Sources:
  • Roberts and Hedges' Clinical Procedures in Emergency Medicine, p. 888
  • Tintinalli's Emergency Medicine: A Comprehensive Study Guide, p. 1958
  • Pfenninger and Fowler's Procedures for Primary Care, 3rd ed.
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