Fungal Infections and Nail Disorders

Diagnosis and Treatment

• Confirm diagnosis before treatment, particularly for fungal infections, where mycological confirmation should be obtained before starting treatment, as recommended by the British Journal of Dermatology guidelines 1
• For fungal infections, complete nail avulsion may be necessary in cases of treatment failure, particularly with subungual dermatophytoma, according to the British Journal of Dermatology guidelines 1
• Itraconazole is the most effective agent for candidal onychomycosis with nail plate invasion, as stated by the British Journal of Dermatology guidelines 1
• If avulsion is performed due to fungal infection treatment failure, consider systemic antifungal therapy during nail regrowth, as suggested by the British Journal of Dermatology guidelines 1
• The American Academy of Dermatology suggests assessing for nail matrix damage, which may require partial or complete nail removal to visualize the matrix, and if the nail matrix is damaged, mechanical intervention may be necessary to remove any damaged tissue within the nail plate or nail bed 2

Ingrown Toenail Management

• Determine the severity of the ingrown toenail, categorized as mild (nail edge causing discomfort with minimal erythema), moderate (pain, erythema, edema, and possible drainage), or severe (significant pain, pronounced inflammation, infection with purulent drainage, or granulation tissue), to guide treatment approach 2
• Initial treatment for ingrown toenails should focus on conservative measures, including warm soaks, cotton wisps under the nail edge, and proper nail trimming, reserving surgical intervention for moderate to severe cases or when conservative management fails, as per general medical guidelines 2
• Proper nail care, including trimming nails straight across, filing nail surfaces with an emery board after softening in warm water, and keeping nails short and clean, is recommended for prevention and management 2
• Separation techniques, like placing cotton wisps or dental floss under the ingrown nail edge, can help relieve pressure and promote healing 2
• Topical treatments, including mid- to high-potency topical corticosteroid ointment for inflammation and topical antiseptics, may be applied to reduce symptoms and prevent infection 2
• Partial nail avulsion, which involves removing the detached or ingrown portion of the nail plate and cleaning the nail bed thoroughly, is considered for more severe cases or when conservative management fails 2
• Matrixectomy options, such as chemical matrixectomy with phenol or surgical excision of the nail matrix, can be effective for preventing recurrence, with partial nail avulsion combined with phenolization being more effective than surgical excision alone 2

Paronychia Management

• Daily dilute vinegar soaks (50:50 dilution) to nail folds twice daily can be used as a non-antibiotic approach for paronychia management, as recommended by the American Academy of Dermatology 3
• Surgical drainage is mandatory for abscesses in acute bacterial paronychia, as recommended by the American College of Physicians 4, 5
• High-potency topical corticosteroids alone or combined with topical antibiotics can be used to address underlying causes of paronychia, as recommended by the European Academy of Dermatology and Venereology 5
• For fungal involvement, topical antifungals (imidazoles) are recommended, as stated by the Clinical Infectious Diseases guidelines 6
• Oral fluconazole is recommended for Candida species in fungal paronychia, as per the Clinical Infectious Diseases guidelines 6
• Itraconazole is more effective than terbinafine for resistant cases, as recommended by the British Association of Dermatologists 2

Prevention and Monitoring

• Preventive measures, including wearing shoes with adequate toe box width, avoiding high heels and pointed shoes, and applying daily topical emollients to cuticles and periungual tissues, can help prevent ingrown toenails 2
• Keeping hands and feet dry, avoiding prolonged water exposure, wearing gloves while cleaning or doing wet work, and applying daily topical emollients to cuticles and periungual tissues can help prevent paronychia, as recommended by the National Institute for Health and Care Excellence and the American Academy of Dermatology 5, 4
• Regular follow-up every 2-4 weeks until resolution, and immediate return if signs of infection develop, is crucial for monitoring treatment efficacy and potential complications 2
• Monitoring for complications, including permanent nail deformity, secondary infection, and permanent onycholysis, is essential, with follow-up within 1-2 weeks to ensure proper healing and return within 48-72 hours if signs of infection are present, as recommended by the Infectious Diseases Society of America and American Diabetes Association 4, 7, 2, 5

Special Considerations

• Diabetic patients with paronychia require careful monitoring due to increased infection risk, and treatment should include keeping the area dry to prevent further infection, according to the Clinical Infectious Diseases guidelines 6
• Diabetic patients require more vigilant monitoring and earlier intervention due to an increased risk of infection, as recommended by the American Diabetes Association, with a strength of evidence rated as strong 4, 5, 8
• Immunocompromised patients should be especially cautious about infection risk and may require a lower threshold for oral antibiotics and more aggressive treatment, as suggested by the Infectious Diseases Society of America, with a strength of evidence rated as moderate 4, 5, 8
• The psychological impact, especially in adolescents, should be considered in the management approach, ensuring a holistic treatment plan 2