Proximal Subungual Onychomycosis

Proximal subungual onychomycosis (PSO) is a fungal infection that affects the nails, particularly the area beneath the nail plate. In simpler terms, it’s a type of nail fungus that starts at the base of the nail. This article aims to provide a clear and concise understanding of PSO, covering its types, causes, symptoms, diagnostic tests, treatments, and relevant medications.

Types:

There is one primary type of proximal subungual onychomycosis, characterized by the fungus infiltrating the proximal or base part of the nail.

Proximal subungual onychomycosis can be categorized into different types based on its severity and extent of nail involvement:

• a. Superficial PSO: Affects the outermost layer of the nail.
• b. Intermediate PSO: Involves deeper layers, extending towards the middle of the nail.
• c. Total PSO: Spreads throughout the entire nail structure.

Understanding the severity helps in determining the appropriate treatment approach.

Causes 

1. Fungal Infections: Most commonly, PSO is caused by dermatophytes, a group of fungi that thrive in warm and moist environments.
2. Trauma: Injuries to the nail, like stubbing or crushing, can create an entry point for fungi.
3. Weakened Immune System: Conditions such as HIV/AIDS or diabetes can make individuals more susceptible.
4. Prolonged Moisture: Constant exposure to damp or wet conditions, like sweaty shoes, provides an ideal breeding ground for fungi.
5. Poor Nail Hygiene: Neglecting proper nail care can contribute to fungal growth.
6. Age: Older individuals may be more prone due to slower nail growth and weakened immunity.
7. Family History: Genetic factors can play a role in susceptibility.
8. Nail Psoriasis: People with psoriasis are more susceptible to nail infections.
9. Circulation Issues: Poor blood circulation can hinder the body’s ability to fight off infections.
10. Smoking: Tobacco use can weaken the immune system.
11. Immunodeficiency Disorders: Conditions where the immune system is compromised.
12. Poorly Ventilated Footwear: Shoes that don’t allow proper ventilation can create a favorable environment for fungi.
13. Athlete’s Foot: Fungal infections on the skin can spread to the nails.
14. Public Spaces: Fungi thrive in warm and damp places like public showers and swimming pools.
15. Sharing Personal Items: Sharing nail clippers or shoes can spread fungal infections.
16. Peripheral Neuropathy: Nerve damage can affect the sensation in the feet, leading to unnoticed injuries.
17. Humidity: Living in a humid climate can increase the risk of fungal infections.
18. Excessive Sweating: People with hyperhidrosis are more susceptible.
19. Inadequate Foot Care Products: Using unclean or contaminated pedicure tools.
20. Antibiotic Use: Prolonged use of certain antibiotics can disrupt the balance of microorganisms in the body.

Symptoms 

1. Discoloration: Nails may turn yellow, brown, or white.
2. Nail Thickening: The affected nail may become thicker than usual.
3. Brittleness: Nails may become brittle and prone to breaking.
4. Debris Buildup: Accumulation of debris under the nail.
5. Foul Odor: A noticeable unpleasant smell from the infected nail.
6. Separation: The nail may separate from the nail bed.
7. Pain or Discomfort: Pain can occur, especially when pressure is applied.
8. Redness and Swelling: The surrounding skin may become red and swollen.
9. Distorted Shape: Nails may take on an irregular or distorted shape.
10. Grooves or Pits: Small grooves or pits on the nail surface.
11. Nail Crumbling: The nail may start to crumble at the edges.
12. Loss of Shine: Nails may lose their natural shine.
13. Surrounding Skin Infection: Fungal infection can spread to the surrounding skin.
14. Bleeding: In severe cases, bleeding under the nail may occur.
15. Nail Lifting: The nail may lift off the nail bed.
16. Difficulty Trimming: Nails may become difficult to trim due to thickness.
17. Tenderness: The affected area may be tender to the touch.
18. Yellow Streaks: Yellow streaks or spots on the nail.
19. Dark Coloration: Nails may develop dark spots or patches.
20. Inflammation: Inflammation of the nail bed or surrounding tissue.

Diagnostic Tests 

1. Clinical Examination: A healthcare provider will visually inspect the affected nails.
2. Nail Scraping: Collecting a sample from the affected nail for laboratory analysis.
3. KOH Test: Potassium hydroxide is used to detect fungal elements in nail samples.
4. Culture Test: Growing the collected nail sample in a laboratory to identify the specific fungus.
5. PCR Testing: Polymerase chain reaction to detect fungal DNA.
6. Dermoscopy: Examination of the nail using a specialized magnifying tool.
7. Wood’s Lamp Examination: Fluorescent light to detect fungal infections.
8. Fungal Staining: Staining the nail sample to enhance visibility under a microscope.
9. Histopathology: Examining nail tissue under a microscope to identify abnormalities.
10. Blood Tests: Assessing immune function and ruling out systemic conditions.
11. X-rays: To rule out other nail disorders or bone involvement.
12. Bacterial Culture: To rule out bacterial infections.
13. Immunofluorescence: Using fluorescent dyes to detect fungal elements.
14. Nail Biopsy: Removal of a small piece of nail for detailed examination.
15. DNA Probe Testing: Identifying specific fungi through genetic analysis.
16. Electron Microscopy: High-powered microscopy for detailed fungal visualization.
17. Thermography: Infrared imaging to detect temperature changes indicative of infection.
18. Patch Testing: Identifying potential allergic reactions to nail products.
19. Nail Clipping Analysis: Examining clippings for fungal presence.
20. Video Dermoscopy: Recording and analyzing changes in the nail over time.

Treatments 

1. Oral Antifungal Medications: Prescription medications like terbinafine or itraconazole.
2. Topical Antifungal Creams: Over-the-counter or prescription creams applied directly to the affected nails.
3. Nail Lacquers: Medicated nail polish containing antifungal agents.
4. Oral Antifungal Solutions: Prescription liquid medications for oral consumption.
5. Laser Therapy: Using lasers to target and destroy fungal infections.
6. Surgical Nail Removal: In severe cases, surgical removal of the affected nail may be necessary.
7. Photodynamic Therapy: Application of light-activated medications to kill fungi.
8. Cryotherapy: Freezing the affected nail with liquid nitrogen to eliminate the fungus.
9. Iontophoresis: Using electrical currents to enhance the penetration of antifungal medications.
10. Chemical Matrixectomy: Chemical removal of the nail matrix to prevent regrowth.
11. PACT Therapy: Photodynamic Antimicrobial Therapy combining light and a photosensitizing agent.
12. Platelet-Rich Plasma (PRP): Injection of concentrated platelets to stimulate nail growth.
13. Systemic Corticosteroids: In severe cases, corticosteroids may be prescribed to reduce inflammation.
14. Immunotherapy: Stimulating the immune system to fight fungal infections.
15. Physical Debridement: Removing infected nail material using tools.
16. Medical Grade Pedicures: Professional pedicures focusing on hygiene and infection prevention.
17. Hydration Therapy: Maintaining proper nail and skin hydration to discourage fungal growth.
18. Herbal Remedies: Some herbs, like tea tree oil, have antifungal properties.
19. Probiotics: Promoting the growth of beneficial bacteria to counteract fungi.
20. Foot Soaks: Using antifungal solutions in foot baths to reduce fungal load.
21. Phototherapy: Controlled exposure to ultraviolet light to inhibit fungal growth.
22. Proper Footwear: Wearing breathable shoes and changing socks frequently.
23. Dietary Changes: Adopting an anti-inflammatory diet to support overall health.
24. Stress Management: Chronic stress can weaken the immune system; managing stress is crucial.
25. Regular Nail Maintenance: Keeping nails clean, trimmed, and dry.
26. Foot Elevation: Elevating the feet to improve circulation and reduce swelling.
27. Avoiding Tight Shoes: Shoes that squeeze the toes can create a conducive environment for fungi.
28. Natural Ventilation: Allowing shoes to air out and using moisture-wicking insoles.
29. Regular Exercise: Promoting overall health and immune system function.
30. Regular Check-ups: Periodic visits to healthcare providers for ongoing evaluation.

Drugs 

1. Terbinafine (Lamisil): An oral antifungal medication.
2. Itraconazole (Sporanox): Oral antifungal used to treat nail infections.
3. Fluconazole (Diflucan): Another oral antifungal option.
4. Ciclopirox (Penlac): Topical antifungal nail lacquer.
5. Efinaconazole (Jublia): Topical antifungal solution.
6. Tavaborole (Kerydin): Topical antifungal medication for nail infections.
7. Griseofulvin: Oral antifungal used in some cases.
8. Ketoconazole: Oral antifungal with broad-spectrum activity.
9. Amorolfine: Topical antifungal nail lacquer.
10. Clotrimazole: Over-the-counter topical antifungal cream.
11. Miconazole: Another over-the-counter topical antifungal option.
12. Nystatin: Antifungal medication available in various forms.
13. Caspofungin: Intravenous antifungal medication.
14. Micafungin: Another intravenous antifungal option.
15. Anidulafungin: Intravenous antifungal used in certain cases.
16. Voriconazole: Oral or intravenous antifungal for systemic infections.
17. Posaconazole: Oral antifungal used in specific cases.
18. Amphotericin B: Intravenous antifungal for severe infections.
19. Naftifine: Topical antifungal cream.
20. Tolnaftate: Over-the-counter antifungal cream.

Conclusion:

Proximal subungual onychomycosis, though challenging, is manageable with proper understanding and timely intervention. From recognizing the causes and symptoms to exploring diagnostic tests and treatment options, this guide provides a comprehensive overview in plain English. By promoting awareness and accessibility, we aim to empower individuals to make informed decisions about their nail health. Always consult with a healthcare professional for personalized advice tailored to your specific situation.

 

Disclaimer: Each person’s journey is unique, treatment plan, life style, food habit, hormonal condition, immune system, chronic disease condition, previous medical  history is also unique. So always seek the best advice from a qualified medical professional or health care provider before trying any treatments to ensure to find out the best plan for you. This guide is for general information and educational purposes only. If you or someone are suffering from this disease condition bookmark this website or share with someone who might find it useful! Boost your knowledge and stay ahead in your health journey. Thank you for giving your valuable time to read the article.