Treatment of Acute Paronychia

Introduction to Treatment Guidelines

The American Academy of Dermatology recommends implementing warm water soaks for 15 minutes 3-4 times daily or white vinegar soaks (1:1 dilution) for 15 minutes daily for mild acute paronychia 1
The American Academy of Dermatology suggests applying topical 2% povidone-iodine twice daily to the affected area 2, 3
The American Academy of Dermatology advises using mid to high potency topical steroid ointment to nail folds twice daily to reduce inflammation 2, 3

If initial treatment with cephalexin fails, the American College of Physicians recommends sulfamethoxazole-trimethoprim (Bactrim) as it provides broader coverage including MRSA 3
Clindamycin lacks adequate coverage for some streptococcal species and has increasing resistance patterns, making it a suboptimal choice, according to the journal Drugs 4
The American Academy of Dermatology recommends starting oral antibiotics if signs of infection are present, with preferred agents including cephalexin or amoxicillin-clavulanate (Augmentin 500/125 mg every 12 hours) 1, 5

The American College of Physicians recommends swabbing any pus for culture and prescribing appropriate antibiotics based on culture results 4, 1
The American Academy of Dermatology suggests that oral antibiotics are usually not needed if adequate drainage is achieved, unless the patient is immunocompromised or severe infection is present 1

Up to 25% of paronychia cases have secondary bacterial or mycological superinfections, according to the American College of Physicians 3, 1, 5
Bacterial cultures should be obtained before starting antibiotics, especially in severe cases or treatment failures, as recommended by the American College of Physicians 5

The American Academy of Dermatology recommends reassessing after 2 weeks of treatment 3, 1
If no improvement is seen, the American Academy of Dermatology suggests considering referral to dermatology or podiatry for further evaluation 3, 1

Intolerable grade 2 or grade 3 paronychia requires surgical intervention, including drainage techniques such as instrumentation with a hypodermic needle or wide incision with scalpel, and partial nail plate avulsion may be necessary for severe cases with pyogenic granuloma 6, 7, 8
Any abscess formation mandates drainage, and options range from simple incision and drainage to more complex procedures 6, 7

Up to 25% of paronychia cases have secondary bacterial or mycological superinfections, and both gram-positive and gram-negative organisms have been implicated, highlighting the importance of obtaining bacterial/viral/fungal cultures before starting antibiotics 6, 7
For candidal paronychia, the most important intervention is drainage, and topical azoles and polyenes are effective for candidal skin infections, with the addition of keeping the infected area dry 9

Topical timolol 0.5% gel twice daily under occlusion for 1 month has shown complete clearance in patients with periungual pyogenic granulomas, and silver nitrate chemical cauterization or cryotherapy can be considered as alternative options 7, 8

Reassess after 2 weeks of treatment, and if reactions worsen or do not improve, escalate therapy to the next level, with consideration of referral to dermatology or podiatry if no improvement is seen after appropriate treatment 6

Critical preventive measures to discuss with patients include avoiding biting nails or cutting nails too short, regular trimming ensuring nails are straight and not too short, daily application of topical emollients to cuticles and periungual tissues, wearing gloves while cleaning, and wearing comfortable well-fitting shoes and cotton socks 7, 8